Add Docker build script for Elsa Studio

This commit introduces a Dockerfile for the Elsa Studio application and a corresponding GitHub workflow for building and deploying the Docker image. These make it possible to automatically build and deploy Elsa Studio as a Docker image.

.github/workflows/elsa-studio.yml

@@ -0,0 +1,61 @@
+name: Build and deploy Elsa SStudio reference application as Docker image
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            elsaworkflows/elsa-studio-v3
+          flavor: |
+            latest=true
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=sha
+
+      - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASS }}
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v3
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./docker/ElsaStudio.Dockerfile
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}

Elsa.sln

@@ -121,6 +121,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "docker", "docker", "{986E54
 		docker\.dockerignore = docker\.dockerignore
 		docker\ElsaServer.Dockerfile = docker\ElsaServer.Dockerfile
 		docker\ElsaServerAndStudio.Dockerfile = docker\ElsaServerAndStudio.Dockerfile
+		docker\ElsaStudio.Dockerfile = docker\ElsaStudio.Dockerfile
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Elsa.Samples.AspNet.RunTaskIntegration", "src\samples\aspnet\Elsa.Samples.AspNet.RunTaskIntegration\Elsa.Samples.AspNet.RunTaskIntegration.csproj", "{51050209-EC2F-4DC7-8F46-07E22B7811CD}"
@@ -290,6 +291,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "pipelines", "pipelines", "{
 		.github\workflows\elsa-server-and-studio.yml = .github\workflows\elsa-server-and-studio.yml
 		.github\workflows\elsa-server.yml = .github\workflows\elsa-server.yml
 		.github\workflows\packages.yml = .github\workflows\packages.yml
+		.github\workflows\elsa-studio.yml = .github\workflows\elsa-studio.yml
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Studio.Web", "src\bundles\Elsa.Studio.Web\Elsa.Studio.Web.csproj", "{D5C149EE-276C-4C59-98F9-37F0EA2A7866}"

docker/ElsaStudio.Dockerfile

@@ -0,0 +1,25 @@
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-bookworm-slim AS build
+WORKDIR /source
+
+# copy sources.
+COPY src/. ./src
+COPY ./NuGet.Config ./
+COPY *.props ./
+
+# restore packages.
+RUN dotnet restore "./src/bundles/ElsaStudioWebAssembly/ElsaStudioWebAssembly.csproj"
+RUN dotnet restore "./src/bundles/Elsa.Studio.Web/Elsa.Studio.Web.csproj"
+
+# build and publish (UseAppHost=false creates platform independent binaries).
+WORKDIR /source/src/bundles/Elsa.Studio.Web
+RUN dotnet build "Elsa.Studio.Web.csproj" -c Release -o /app/build
+RUN dotnet publish "Elsa.Studio.Web.csproj" -c Release -o /app/publish /p:UseAppHost=false --no-restore -f net8.0
+
+# move binaries into smaller base image.
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-bookworm-slim AS base
+WORKDIR /app
+COPY --from=build /app/publish ./
+
+EXPOSE 80/tcp
+EXPOSE 443/tcp
+ENTRYPOINT ["dotnet", "Elsa.Studio.Web.dll"]