feat: Add Dockerfile.dotnet6

.github/workflows/test.yml

@@ -5,6 +5,7 @@ on: push
 env: 
   test-results-folder: _test-results
   test-runtime-deps-image-name: ubuntu/dotnet-runtime-deps:test
+  test-runtime-image-name: ubuntu/dotnet-runtime:test
   test-oci-image-name: ubuntu_dotnet-runtime-deps_test
   log-file: output.log
 
@@ -35,11 +36,22 @@ jobs:
           dockerfile: Dockerfile.runtime
           ignore: DL3008,SC2046,DL3015
 
+      - name: Lint the .NET runtime container image recipe
+        uses: hadolint/hadolint-action@v2.0.0
+        with:
+          dockerfile: Dockerfile.dotnet6
+          ignore: DL3008,SC2046,DL3015,DL3003,DL3006
+
       - name: Build the .NET runtime deps container image
         run: |
           exec &> >(tee ${{ github.workspace }}/${{ env.test-results-folder }}/${{ env.log-file }})
           docker build -t ${{ env.test-runtime-deps-image-name }} -f Dockerfile.runtime .
 
+      - name: Build the .NET runtime container image
+        run: |
+          exec &> >(tee ${{ github.workspace }}/${{ env.test-results-folder }}/${{ env.log-file }})
+          docker build -t ${{ env.test-runtime-image-name }} -f Dockerfile.dotnet6 --build-arg RUNTIME_DEPS_IMAGE=${{ env.test-runtime-deps-image-name }} .
+
       - name: Collect ${{ env.test-runtime-deps-image-name }} as an OCI artifact
         run: |
           exec &> >(tee -a ${{ github.workspace }}/${{ env.test-results-folder }}/${{ env.log-file }})

Dockerfile.dotnet6

@@ -0,0 +1,21 @@
+ARG RUNTIME_DEPS_IMAGE
+ARG DOTNET_VERSION="6.0.5"
+ARG DOTNET_SHA512="c228f0ba0ecc4ccda708e97529b248dd6d70f7f747ead6453623be77e8e1529b54db52f5df1b5e00b5b7f92b73389560832f80607fc07e50879d55ce905afcf7"
+
+FROM ubuntu:22.04 as builder
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y curl ca-certificates
+ARG DOTNET_VERSION DOTNET_SHA512
+SHELL ["/bin/bash", "-oeux", "pipefail", "-c"]
+RUN curl -fSL -o /dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Runtime/$DOTNET_VERSION/dotnet-runtime-$DOTNET_VERSION-linux-x64.tar.gz \
+    && echo "$DOTNET_SHA512 /dotnet.tar.gz" | sha512sum -c - \
+    && mkdir /rootfs-dotnet \
+    && cd /rootfs-dotnet \
+    && mkdir -p usr/share/dotnet usr/bin \
+    && tar -oxzf /dotnet.tar.gz -C usr/share/dotnet \
+    && rm /dotnet.tar.gz \
+    && ln -s /usr/share/dotnet/dotnet usr/bin/dotnet
+
+FROM $RUNTIME_DEPS_IMAGE
+ARG DOTNET_VERSION
+ENV DOTNET_VERSION=$DOTNET_VERSION
+COPY --from=builder /rootfs-dotnet/ /