Default to build and publish extendible image (#1246)

Switch to publishing the image containing all of the libraries and build
dependencies needed to support the plugin being reinstalled as that is
the default behaviour when vagrant installs a new plugin.

This should allow the default image to be extended with additional
plugins and if needed, the authors of the new image may follow and use
the slim version as a base to provide a reduced size docker image.

Fixes: #1198

.github/workflows/docker-image.yml

@@ -45,6 +45,7 @@ jobs:
           fi
           echo ::set-output name=version::${VERSION}
           echo ::set-output name=tags::${TAGS}
+          echo ::set-output name=slim_tags::$(echo $TAGS | sed "s/,/-slim,/g")-slim
           echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
         env:
           DOCKERHUB_ORGANIZATION: ${{ secrets.DOCKERHUB_ORGANIZATION }}
@@ -77,7 +78,7 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       -
-        name: Build and push
+        name: Build and push main image
         id: docker_build
         uses: docker/build-push-action@v2
         with:
@@ -85,6 +86,28 @@ jobs:
           platforms: linux/amd64
           push: ${{ steps.have_credentials.outputs.access }}
           tags: ${{ steps.prep.outputs.tags }}
+          target: final
+          labels: |
+            org.opencontainers.image.title=${{ github.event.repository.name }}
+            org.opencontainers.image.description=${{ github.event.repository.description }}
+            org.opencontainers.image.url=${{ github.event.repository.html_url }}
+            org.opencontainers.image.source=${{ github.event.repository.clone_url }}
+            org.opencontainers.image.version=${{ steps.prep.outputs.version }}
+            org.opencontainers.image.created=${{ steps.prep.outputs.created }}
+            org.opencontainers.image.revision=${{ github.sha }}
+            org.opencontainers.image.licenses=${{ github.event.repository.license.spdx_id }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache,mode=max
+      -
+        name: Build and push slim image
+        id: docker_build_slim
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64
+          push: ${{ steps.have_credentials.outputs.access }}
+          tags: ${{ steps.prep.outputs.slim_tags }}
+          target: slim
           labels: |
             org.opencontainers.image.title=${{ github.event.repository.name }}
             org.opencontainers.image.description=${{ github.event.repository.description }}
@@ -99,3 +122,6 @@ jobs:
       -
         name: Image digest
         run: echo ${{ steps.docker_build.outputs.digest }}
+      -
+        name: Image digest Slim
+        run: echo ${{ steps.docker_build_slim.outputs.digest }}