Reducing docker image size (#9)

Also
* Update dependencies
* Adopt standard github gitignore for node projects
* Using body typography

.gitignore

@@ -1,29 +1,128 @@
-.sass-cache
-.DS_Store
-.start.pid
-.port.tmp
-public
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+
+
 assets/stylesheets/*.css
-lib/govuk_template.html
-govuk_modules
-node_modules/*
-.tmuxp.*
 .idea
 .vscode
-npm-debug.log
-build/*
-uploads/*
-test-results.xml
 build-info.json
-.env
-yarn-error.log
-.eslintcache
 dist/
 test_results/
 integration_tests/videos/
 integration_tests/screenshots/
-.localstack
 */*.iml
-*secrets*.yaml
-!secrets-example.yaml
-!**/templates/secrets.yaml

Dockerfile

@@ -1,4 +1,4 @@
-# Build stage 1.
+# Stage: base image
 ARG BUILD_NUMBER
 ARG GIT_REF
 
@@ -17,24 +17,28 @@ WORKDIR /app
 RUN apt-get update && \
     apt-get upgrade -y
 
-# Build stage 2.
+# Stage: build assets
 FROM base as build
 ARG BUILD_NUMBER
 ARG GIT_REF
 
 RUN apt-get install -y make python g++
 
+COPY package*.json ./
+RUN CYPRESS_INSTALL_BINARY=0 npm ci --no-audit
+
 COPY . .
+RUN npm run build
 
 ENV BUILD_NUMBER ${BUILD_NUMBER:-1_0_0}
 ENV GIT_REF ${GIT_REF:-dummy}
-
-RUN CYPRESS_INSTALL_BINARY=0 npm ci --no-audit && npm run build  && \
-    export BUILD_NUMBER=${BUILD_NUMBER} && \
+RUN export BUILD_NUMBER=${BUILD_NUMBER} && \
     export GIT_REF=${GIT_REF} && \
     npm run record-build-info
 
-# Build stage 3.
+RUN npm prune --no-audit --production
+
+# Stage: copy production assets and dependencies
 FROM base
 
 RUN apt-get autoremove -y && \
@@ -43,19 +47,20 @@ RUN apt-get autoremove -y && \
 COPY --from=build --chown=appuser:appgroup \
         /app/package.json \
         /app/package-lock.json \
-        /app/dist \
         /app/build-info.json \
         ./
 
 COPY --from=build --chown=appuser:appgroup \
-        /app/assets ./assets
+       /app/assets ./assets
 
 COPY --from=build --chown=appuser:appgroup \
-        /app/node_modules ./node_modules
+        /app/dist ./dist
 
-RUN npm prune --production
+COPY --from=build --chown=appuser:appgroup \
+        /app/node_modules ./node_modules
 
 EXPOSE 3000
+ENV NODE_ENV='production'
 USER 2000
 
-CMD [ "npm", "start" ]
+CMD [ "npm", "start" ]