diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 74ad56b6..6649f6a9 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -2,6 +2,7 @@
 # package ecosystems to update and where the package manifests are located.
 # Please see the documentation for all configuration options:
 # https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+---
 
 version: 2
 updates:
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 5c595aac..ae362194 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -9,21 +9,33 @@
 # the `language` matrix defined below to confirm you have the correct set of
 # supported CodeQL languages.
 #
+---
+
 name: "CodeQL"
 
-on:
+on: # yamllint disable-line rule:truthy
   push:
-    branches: [ "main", "develop", "feature/*" ]
+    branches: ["main", "develop", "feature/*"]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ "main" ]
+    branches: ["main"]
   schedule:
+    #        ┌───────────── minute (0 - 59)
+    #        │  ┌───────────── hour (0 - 23)
+    #        │  │ ┌───────────── day of the month (1 - 31)
+    #        │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #        │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        *  * * * *
     - cron: '37 19 * * 5'
 
 jobs:
   analyze:
     name: Analyze
-    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
+    runs-on:
+      ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
     permissions:
       actions: read
       contents: read
@@ -32,45 +44,50 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'javascript' ]
+        language: ['javascript']
+        # yamllint disable rule:line-length
         # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
         # Use only 'java' to analyze code written in Java, Kotlin or both
         # Use only 'javascript' to analyze code written in JavaScript, TypeScript or both
         # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+        # yamllint enable rule:line-length
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
-
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
+      - name: Checkout repository
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
 
-        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
-        # queries: security-extended,security-and-quality
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          # yamllint disable rule:line-length
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
 
+          # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+          # queries: security-extended,security-and-quality
+          # yamllint enable rule:line-length
 
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v3
+      # yamllint disable rule:line-length
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
 
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
 
-    #   If the Autobuild fails above, remove it and uncomment the following three lines.
-    #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+      #   If the Autobuild fails above, remove it and uncomment the following three lines.
+      #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
 
-    # - run: |
-    #     echo "Run, Build Application using script"
-    #     ./location_of_script_within_repo/buildscript.sh
+      # - run: |
+      #     echo "Run, Build Application using script"
+      #     ./location_of_script_within_repo/buildscript.sh
+      # yamllint enable rule:line-length
 
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
-      with:
-        category: "/language:${{matrix.language}}"
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{matrix.language}}"
diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index 62202cfd..c1894d98 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -1,10 +1,12 @@
+---
+
 name: Docker Image CI
 
-on:
+on: # yamllint disable-line rule:truthy
   push:
-    branches: [ "main", "develop", "feature/*" ]
+    branches: ["main", "develop", "feature/*"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 jobs:
 
@@ -14,28 +16,39 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
-    - name: Build the Docker image
-      run: make compose/rebuild
-    - name: Run test in Docker image
-      run: make compose/run
-    - name: Tag Docker image
-      run: docker tag algorithm-exercises-ts:latest algorithm-exercises-ts:${{ github.sha }}
+      - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
+      - name: Build the Docker image
+        run: make compose/rebuild
+      - name: Lint in Docker image
+        run: make compose/lint
+      - name: Test in Docker image
+        run: make compose/test
+      - name: Run in Docker image
+        run: make compose/run
+      - name: Tag Docker image
+        run: >
+          docker tag
+          algorithm-exercises-ts:latest
+          algorithm-exercises-ts:${{ github.sha }}
 
-    - name: Run Snyk to check Docker image for vulnerabilities
-      # Snyk can be used to break the build when it detects vulnerabilities.
-      # In this case we want to upload the issues to GitHub Code Scanning
-      continue-on-error: true
-      uses: snyk/actions/docker@master
-      env:
-        # In order to use the Snyk Action you will need to have a Snyk API token.
-        # See https://docs.snyk.io/integrations/ci-cd-integrations/github-actions-integration#getting-your-snyk-token
-        # or you can sign up for free at https://snyk.io/login
-        SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
-      with:
+      - name: Run Snyk to check Docker image for vulnerabilities
+        # Snyk can be used to break the build when it detects vulnerabilities.
+        # In this case we want to upload the issues to GitHub Code Scanning
+        continue-on-error: true
+        uses: snyk/actions/docker@master
+        env:
+          # yamllint disable rule:line-length
+          # In order to use the Snyk Action you will need to have a Snyk API token.
+          # See https://docs.snyk.io/integrations/ci-cd-integrations/github-actions-integration#getting-your-snyk-token
+          # or you can sign up for free at https://snyk.io/login
+          # yamllint enable rule:line-length
+          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
+        with:
           image: algorithm-exercises-ts:latest
           args: --file=Dockerfile
-      # - name: Upload result to GitHub Code Scanning
-      #   uses: github/codeql-action/upload-sarif@v2
-      #   with:
-      #     sarif_file: snyk.sarif
+        # yamllint disable rule:comments-indentation
+        # - name: Upload result to GitHub Code Scanning
+        #   uses: github/codeql-action/upload-sarif@v2
+        #   with:
+        #     sarif_file: snyk.sarif
+        # yamllint enable rule:comments-indentation
diff --git a/.github/workflows/eslint.yml b/.github/workflows/eslint.yml
index bddddcb1..a1a3593f 100644
--- a/.github/workflows/eslint.yml
+++ b/.github/workflows/eslint.yml
@@ -6,16 +6,26 @@
 # found in ECMAScript/JavaScript code.
 # More details at https://github.com/eslint/eslint
 # and https://eslint.org
+---
 
 name: ESLint
 
-on:
+on: # yamllint disable-line rule:truthy
   push:
-    branches: [ "main", "develop" ]
+    branches: ["main", "develop"]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ "main" ]
+    branches: ["main"]
   schedule:
+    #        ┌───────────── minute (0 - 59)
+    #        │  ┌───────────── hour (0 - 23)
+    #        │  │ ┌───────────── day of the month (1 - 31)
+    #        │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #        │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        *  * * * *
     - cron: '36 13 * * 1'
 
 jobs:
@@ -25,7 +35,9 @@ jobs:
     permissions:
       contents: read
       security-events: write
-      actions: read # only required for a private repository by github/codeql-action/upload-sarif to get the Action run status
+      # only required for a private repository by
+      # github/codeql-action/upload-sarif to get the Action run status
+      actions: read
     steps:
       - name: Checkout code
         uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
diff --git a/.github/workflows/gitleaks.yml b/.github/workflows/gitleaks.yml
index 39f6532f..0870c98f 100644
--- a/.github/workflows/gitleaks.yml
+++ b/.github/workflows/gitleaks.yml
@@ -1,9 +1,21 @@
+---
+
 name: gitleaks
-on:
+
+on: # yamllint disable-line rule:truthy
   pull_request:
   push:
   workflow_dispatch:
   schedule:
+    #        ┌───────────── minute (0 - 59)
+    #        │  ┌───────────── hour (0 - 23)
+    #        │  │ ┌───────────── day of the month (1 - 31)
+    #        │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #        │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        *  * * * *
     - cron: "0 4 * * *" # run once a day at 4 AM
 jobs:
   scan:
@@ -16,4 +28,5 @@ jobs:
       - uses: gitleaks/gitleaks-action@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          # GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE}} # Only required for Organizations, not personal accounts.
+          # Only required for Organizations, not personal accounts.
+          # GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE}}
diff --git a/.github/workflows/markdown-lint.yml b/.github/workflows/markdown-lint.yml
index 4793a9af..acbdad2f 100644
--- a/.github/workflows/markdown-lint.yml
+++ b/.github/workflows/markdown-lint.yml
@@ -1,10 +1,12 @@
+---
+
 name: Markdown Lint
 
-on:
+on: # yamllint disable-line rule:truthy
   push:
-    branches: [ "main", "develop", "feature/*" ]
+    branches: ["main", "develop", "feature/*"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 jobs:
   build:
@@ -15,20 +17,22 @@ jobs:
       matrix:
         os: ["ubuntu-latest"]
         node-version: [20.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+        # See supported Node.js release schedule
+        # at https://nodejs.org/en/about/releases/
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
-
-    - name: Set up Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v4
-      with:
-        node-version: ${{ matrix.node-version }}
+      - name: Checkout repository
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
 
-    - name: Install dependencies
-      run: npm install -g markdownlint-cli
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
 
-    - name: Lint
-      run: markdownlint '**/*.md' --ignore node_modules && echo '✔  Your code looks good.'
+      - name: Install dependencies
+        run: npm install -g markdownlint-cli
 
+      - name: Lint
+        run: >
+          markdownlint '**/*.md' --ignore node_modules
+          && echo '✔  Your code looks good.'
diff --git a/.github/workflows/node-coverage.js.yml b/.github/workflows/node-coverage.js.yml
index 2c694c9f..ba8a3a39 100644
--- a/.github/workflows/node-coverage.js.yml
+++ b/.github/workflows/node-coverage.js.yml
@@ -1,10 +1,12 @@
+---
+
 name: Node.js CI Coverage
 
-on:
+on: # yamllint disable-line rule:truthy
   push:
-    branches: [ "main", "develop", "feature/*" ]
+    branches: ["main", "develop", "feature/*"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 jobs:
   build:
@@ -13,39 +15,38 @@ jobs:
 
     strategy:
       matrix:
-        os: [
-            "ubuntu-latest"
-          ]
         node-version: [22.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+        # See supported Node.js release schedule
+        # at https://nodejs.org/en/about/releases/
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
-      with:
-        fetch-depth: 0
-    - name: Set up Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v4
-      with:
-        node-version: ${{ matrix.node-version }}
-
-    - name: Install dependencies
-      run: npm ci --verbose
-
-    - name: Lint
-      run: npm run lint
-
-    - name: Run the tests
-      run: npm run jest:ci -- --coverage
-
-    - name: Upload coverage reports to Codecov with GitHub Action
-      uses: codecov/codecov-action@v4
-      with:
-        token: ${{ secrets.CODECOV_TOKEN }} # required
-        verbose: true # optional (default = false)
-
-    - name: SonarCloud Scan
-      uses: SonarSource/sonarcloud-github-action@master
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
-        SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+      - name: Checkout repository
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
+        with:
+          fetch-depth: 0
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install dependencies
+        run: npm ci --verbose
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Run the tests
+        run: npm run jest:ci -- --coverage
+
+      - name: Upload coverage reports to Codecov with GitHub Action
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }} # required
+          verbose: true # optional (default = false)
+
+      - name: SonarCloud Scan
+        uses: SonarSource/sonarcloud-github-action@master
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          # Needed to get PR information, if any
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/node-snyk.yml b/.github/workflows/node-snyk.yml
index 188e3191..daf35d6a 100644
--- a/.github/workflows/node-snyk.yml
+++ b/.github/workflows/node-snyk.yml
@@ -1,13 +1,16 @@
+# yamllint disable rule:line-length
 # This workflow will build a .NET project
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-net
+# yamllint enable rule:line-length
+---
 
 name: Snyk Code analysis
 
-on:
+on: # yamllint disable-line rule:truthy
   push:
-    branches: [ main, develop, feature/* ]
+    branches: ["main", "develop", "feature/*"]
   pull_request:
-    branches: [ main ]
+    branches: ["main"]
 
 jobs:
   security:
diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index ae83b6a5..c690f710 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -1,10 +1,12 @@
+---
+
 name: Node.js CI Tests
 
-on:
+on: # yamllint disable-line rule:truthy
   push:
-    branches: [ "main", "develop", "feature/*" ]
+    branches: ["main", "develop", "feature/*"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 jobs:
   build:
@@ -14,27 +16,28 @@ jobs:
     strategy:
       matrix:
         os: [
-            "windows-latest",
-            "ubuntu-latest",
-            "macOS-latest"
-          ]
+          "windows-latest",
+          "ubuntu-latest",
+          "macOS-latest"
+        ]
         node-version: [18.x, 20.x, 22.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+        # See supported Node.js release schedule
+        # at https://nodejs.org/en/about/releases/
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
+      - name: Checkout repository
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
 
-    - name: Set up Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v4
-      with:
-        node-version: ${{ matrix.node-version }}
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
 
-    - name: Install dependencies
-      run: npm ci --verbose
+      - name: Install dependencies
+        run: npm ci --verbose
 
-    - name: Lint
-      run: npm run lint
+      - name: Lint
+        run: npm run lint
 
-    - name: Run the tests
-      run: npm run jest:ci
+      - name: Run the tests
+        run: npm run jest:ci
diff --git a/.github/workflows/yamllint.yml b/.github/workflows/yamllint.yml
new file mode 100644
index 00000000..3f5009c6
--- /dev/null
+++ b/.github/workflows/yamllint.yml
@@ -0,0 +1,24 @@
+---
+
+name: YAML lint
+
+on: # yamllint disable-line rule:truthy
+  push:
+    branches: ["main", "develop", "feature/*"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
+
+      - name: Install yamllint
+        run: pip install yamllint
+
+      - name: Lint YAML files
+        run: >
+          yamllint --strict .
+          && echo '✔  Your code looks good.'
diff --git a/.markdownlint.yaml b/.markdownlint.yaml
index caa54a79..3fd17fdf 100644
--- a/.markdownlint.yaml
+++ b/.markdownlint.yaml
@@ -1,3 +1,7 @@
+---
+
+# yamllint disable rule:line-length
+
 # Example markdownlint configuration with all properties set to their default value
 
 # Default state for all rules
@@ -261,3 +265,5 @@ MD053:
   # Ignored definitions
   ignored_definitions:
     - "//"
+
+# yamllint enable rule:line-length
diff --git a/.yamlignore b/.yamlignore
new file mode 100644
index 00000000..544b4c7f
--- /dev/null
+++ b/.yamlignore
@@ -0,0 +1 @@
+.trunk/*
diff --git a/.yamllint b/.yamllint
new file mode 100644
index 00000000..b6288375
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,19 @@
+---
+extends: default
+
+ignore-from-file: [.gitignore, .yamlignore]
+
+rules:
+  comments:
+    min-spaces-from-content: 1
+
+# yamllint disable rule:line-length
+#
+# References:
+# False positive: interpreting GitHub actions "on:" as a truthy value #430
+# https://github.com/adrienverge/yamllint/issues/430
+#
+# YAML formatting not compliant with yamllint "spaces before comments" requirement #433
+# https://github.com/redhat-developer/vscode-yaml/issues/433#issuecomment-1235681987
+#
+# yamllint enable rule:line-length
diff --git a/Dockerfile b/Dockerfile
index 9239dc1e..254d03c4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,14 +7,20 @@ ENV WORKDIR=/app
 WORKDIR ${WORKDIR}
 
 ###############################################################################
-FROM node:20.14.0-alpine3.20 AS lint
+FROM base AS lint
 
 ENV WORKDIR=/app
 WORKDIR ${WORKDIR}
 
-COPY ./src ${WORKDIR}/src
-RUN apk add --update --no-cache make
-RUN npm install -g markdownlint-cli
+RUN apk add --update --no-cache make nodejs npm
+RUN apk add --update --no-cache yamllint
+
+RUN npm install -g --ignore-scripts markdownlint-cli
+
+# [!TIP] Use a bind-mount to "/app" to override following "copys"
+# for lint and test against "current" sources in this stage
+
+CMD ["make", "lint"]
 
 ###############################################################################
 FROM base AS development
@@ -28,7 +34,7 @@ COPY ./package-lock.json ${WORKDIR}/package-lock.json
 COPY ./Makefile ${WORKDIR}/
 COPY ./tsconfig.json ${WORKDIR}/tsconfig.json
 
-RUN npm ci --verbose
+RUN npm ci --verbose --ignore-scripts
 
 ###############################################################################
 ### In testing stage, can't use USER, due permissions issue
diff --git a/Makefile b/Makefile
index 3a54bd15..91998795 100644
--- a/Makefile
+++ b/Makefile
@@ -57,16 +57,25 @@ dependencies:
 	test -x ./node_modules ||  npm install --verbose
 	@echo "################################################################################"
 
-mdlint:
+lint/markdown:
 	markdownlint '**/*.md' --ignore node_modules && echo '✔  Your code looks good.'
 
-lint: test/static mdlint
+lint/yaml:
+	yamllint --stric . && echo '✔  Your code looks good.'
+
+lint: lint/markdown lint/yaml test/styling test/static
 
 test/static: dependencies
-	npm run lint
+	${NPM} run lint
+
+test/styling: dependencies
+	${NPM} run style:check
 
-test: env dependencies test/static
-	npm run jest:ci
+format: dependencies
+	${NPM} run style:format
+
+test: env dependencies
+	${NPM} run jest:ci
 
 coverage: test
 
@@ -81,21 +90,37 @@ update: dependencies outdated
 upgrade: update
 
 compose/build: env
+	docker-compose --profile lint build
 	docker-compose --profile testing build
+	docker-compose --profile production build
 
 compose/rebuild: env
+	docker-compose --profile lint build --no-cache
 	docker-compose --profile testing build --no-cache
+	docker-compose --profile production build --no-cache
 
-compose/mdlint: env
+compose/lint/markdown: compose/build
 	docker-compose --profile lint build
-	docker-compose --profile lint run --rm algorithm-exercises-ts-mdlint make mdlint
+	docker-compose --profile lint run --rm algorithm-exercises-ts-lint make lint/markdown
+
+compose/lint/yaml: compose/build
+	docker-compose --profile lint run --rm algorithm-exercises-ts-lint make lint/yaml
+
+compose/test/styling: compose/build
+	docker-compose --profile lint run --rm algorithm-exercises-ts-lint make test/styling
 
 compose/test/static: compose/build
-	docker-compose --profile testing run --rm algorithm-exercises-ts make test/static
+	docker-compose --profile lint run --rm algorithm-exercises-ts-lint make test/static
 
-compose/lint: compose/test/static compose/mdlint
+compose/lint: compose/lint/markdown compose/lint/yaml compose/test/styling compose/test/static
+
+compose/test: compose/build
+	docker-compose --profile testing run --rm algorithm-exercises-ts-test make test
 
 compose/run: compose/build
-	docker-compose --profile testing run --rm algorithm-exercises-ts make test
+	docker-compose --profile production run --rm algorithm-exercises-ts make run
 
 all: env dependencies test
+
+run:
+	ls -alh
diff --git a/compose.yaml b/compose.yaml
index ac92e7bc..47be7c55 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -1,5 +1,6 @@
+---
 services:
-  algorithm-exercises-ts:
+  algorithm-exercises-ts-test:
     image: algorithm-exercises-ts:latest
     build:
       context: .
@@ -11,14 +12,14 @@ services:
       - ./coverage:/app/coverage
     profiles: ["testing"]
 
-  algorithm-exercises-ts-mdlint:
-    image: algorithm-exercises-ts:mdlint
+  algorithm-exercises-ts-lint:
+    image: algorithm-exercises-ts:lint
     build:
       context: .
       target: lint
     # environment:
-      # LOG_LEVEL: ${LOG_LEVEL:-info} ## (1) ## info | debug
-      # BRUTEFORCE: ${BRUTEFORCE:-false} ## (1) ## true | false
+    #   LOG_LEVEL: ${LOG_LEVEL:-info} ## (1) ## info | debug
+    #   BRUTEFORCE: ${BRUTEFORCE:-false} ## (1) ## true | false
     volumes:
       - ./:/app
     profiles: ["lint"]
@@ -35,6 +36,15 @@ services:
       - ./:/app
     profiles: ["development"]
 
+  algorithm-exercises-ts:
+    image: algorithm-exercises-ts:latest
+    build:
+      context: .
+      target: production
+    # volumes:
+    #   - ./:/app
+    profiles: ["production"]
+
 ## REFERENCES:
 ## (1) Passing Environment variable with fallback value:
 ##    https://stackoverflow.com/a/70772707/6366150
diff --git a/package.json b/package.json
index 3f94a082..bf72ac3b 100644
--- a/package.json
+++ b/package.json
@@ -26,13 +26,14 @@
   },
   "scripts": {
     "start": "npm run test",
-    "lint": "npx eslint . --color --max-warnings=0 && echo '✔  Your code looks good.'",
+    "lint": "npx --yes eslint . --color --max-warnings=0 && echo '✔  Your code looks good.'",
     "jest:ci": "node --experimental-vm-modules ./node_modules/.bin/jest --no-cache --ci --color --detectOpenHandles --forceExit --runInBand --debug",
-    "jest:clean": "jest --clearCache && watchman watch-del-all",
+    "jest:clean": "npx --yes jest --clearCache && npx --yes watchman watch-del-all",
     "jest:bruteforce": "BRUTEFORCE=true node --experimental-vm-modules ./node_modules/.bin/jest --no-cache --ci --color --detectOpenHandles --forceExit --runInBand --debug",
     "jest:watch": "node --experimental-vm-modules ./node_modules/.bin/jest --no-cache --ci --color --detectOpenHandles --forceExit --runInBand --debug --watchAll",
-    "prettier": "npx prettier --write 'src/**/*.js'",
-    "test": "jest",
+    "style:format": "npx --yes prettier --write 'src/**/*.ts'",
+    "style:check": "npx --yes prettier --check 'src/**/*.ts'",
+    "test": "npm run jest:ci",
     "update-all": "npm install $(npm outdated | cut -d' ' -f 1 | sed '1d' | xargs -I '$' echo '$@latest' | xargs echo)"
   }
 }