Fix

.github/workflows/docker-publish.yml

@@ -15,6 +15,12 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@v4
       
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log in to the Container registry
         uses: docker/login-action@v3
         with:
@@ -33,7 +39,8 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: ${{ github.workspace }}/src
-          file: ${{ github.workspace }}/src/DynDNSv2/Dockerfile
+          file: ${{ github.workspace }}/src/DynDNSv2/MultiBuild.Dockerfile
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

src/DynDNSv2/DynDNSv2.csproj

@@ -6,6 +6,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+	<!--<ContainerFamily>alpine</ContainerFamily>-->
     <UserSecretsId>abe55787-bc11-416d-85aa-eaf544f21fe1</UserSecretsId>
   </PropertyGroup>
 

src/DynDNSv2/MultiBuild.Dockerfile

@@ -0,0 +1,21 @@
+# Learn about building .NET container images:
+# https://github.com/dotnet/dotnet-docker/blob/main/samples/README.md
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS build
+ARG TARGETARCH
+WORKDIR /source
+
+# copy csproj and restore as distinct layers
+COPY ./DynDNSv2/DynDNSv2.csproj .
+RUN dotnet restore -a $TARGETARCH
+
+# copy and publish app and libraries
+COPY ./DynDNSv2/. .
+RUN dotnet publish --no-restore -a $TARGETARCH -o /app
+
+# Enable globalization and time zones:
+# https://github.com/dotnet/dotnet-docker/blob/main/samples/enable-globalization.md
+# final stage/image
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine
+WORKDIR /app
+COPY --from=build /app .
+ENTRYPOINT ["./DynDNSv2"]