add step to setp qemu to fix build error (#3)

.github/workflows/docker-publish.yml

@@ -39,35 +39,32 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      # Install the cosign tool except on PR
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 #v3.5.0
         with:
           cosign-release: 'v2.2.4'
-
-      # Set up BuildKit Docker container builder to be able to build
-      # multi-platform images and export cache
+
       # https://github.com/docker/setup-buildx-action
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
+        uses: docker/setup-buildx-action@v3
+        with:
+          platforms: linux/amd64,linux/arm64
 
-      # Login against a Docker registry except on PR
       # https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
+        uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      # Extract metadata (tags, labels) for Docker
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
+        uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 

ressurser/simple-api/Dockerfile

@@ -1,23 +1,20 @@
-FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
-USER $APP_UID
-WORKDIR /app
-EXPOSE 8080
-EXPOSE 8081
+
 
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
-ARG BUILD_CONFIGURATION=Release
+# start build stage
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS build
+ARG TARGETARCH
 WORKDIR /src
-COPY ["simple-api.csproj", "./"]
-RUN dotnet restore "simple-api.csproj"
+# copy csproj and restore as distinct layers
+COPY simple-api.csproj .
+RUN dotnet restore -a $TARGETARCH
+# copy and publish app and libraries
 COPY . .
-WORKDIR "/src/"
-RUN dotnet build "simple-api.csproj" -c $BUILD_CONFIGURATION -o /app/build
-
-FROM build AS publish
-ARG BUILD_CONFIGURATION=Release
-RUN dotnet publish "simple-api.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
-
-FROM base AS final
+RUN dotnet publish -a $TARGETARCH -c Release --no-restore -o /app
+# final stage and image
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine
 WORKDIR /app
-COPY --from=publish /app/publish .
+COPY --from=build /app .
+USER $APP_UID
+ENV ASPNETCORE_URLS=http://+:8080
 ENTRYPOINT ["dotnet", "simple-api.dll"]
+EXPOSE 8080