CI: Github Container Registry too

.github/workflows/main.yml

@@ -19,21 +19,32 @@ jobs:
             id: prep
             run: |
               DOCKER_IMAGE=phusion/baseimage
-              VERSION=focal-test
               GIT_BRANCH=${GITHUB_REF##*/}
-              TAGS="${DOCKER_IMAGE}:${GIT_BRANCH}"
+              TAGS="${DOCKER_IMAGE}:${GIT_BRANCH}, ghcr.io/${{ github.repository_owner }}/baseimage:${GIT_BRANCH}"
               
               # Set output parameters.
               
+              if [ "${{github.event_name}}" == "pull_request" ]; then
+                echo ::set-output name=push::false
+              else
                 echo ::set-output name=tags::${TAGS}
                 echo ::set-output name=branch::${GIT_BRANCH}
                 echo ::set-output name=docker_image::${DOCKER_IMAGE}
+              fi
                
           - name: Set up QEMU
             uses: docker/setup-qemu-action@v1
             with:
               platforms: amd64,arm64
               
+          - name: Login to GHCR (Github Container Registry)
+            uses: docker/login-action@v1
+            if: github.event_name != 'pull_request'
+            with:
+             registry: ghcr.io
+             username: ${{ github.actor }}
+             password: ${{ secrets.GITHUB_TOKEN }}
+
           - name: Set up Docker Buildx
             id: buildx
             uses: docker/setup-buildx-action@v1
@@ -42,6 +53,7 @@ jobs:
               version: latest
               driver-opts: image=moby/buildkit:latest
               
+
           - name: Login to Docker Hub
             if: github.event_name != 'pull_request'
             uses: docker/login-action@v1
@@ -52,9 +64,8 @@ jobs:
           - name: Build and Push
             uses: docker/build-push-action@v2
             with:
-              build-args: VERSION=focal-1.0.0-test
               builder: ${{ steps.buildx.outputs.name }}
               context: image
               platforms: amd64,arm64
-              push: true
+              push: ${{ steps.prep.outputs.push }}
               tags: ${{ steps.prep.outputs.tags }}