Add GHCR build

.github/workflows/build_container_image.yaml

@@ -10,8 +10,67 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 jobs:
+  ghcrbuild:
+    name: Build container image for GHCR
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      # https://stackoverflow.com/questions/59810838/how-to-get-the-short-sha-for-the-github-workflow
+      - name: Set outputs
+        id: commit
+        run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+      - name: Set branch name
+        id: branch
+        run: |
+          if [[ "$GITHUB_REF" == "refs/tags/"* ]]; then
+            echo "name=${GITHUB_REF#refs/tags/v}" >> $GITHUB_OUTPUT
+          elif [[ "$GITHUB_REF" == "refs/heads/dev" ]]; then
+            echo "name=dev" >> $GITHUB_OUTPUT
+          elif [[ "$GITHUB_REF" == "refs/heads/release_"* ]]; then
+            echo "name=${GITHUB_REF#refs/heads/release_}-auto" >> $GITHUB_OUTPUT
+          fi
+        shell: bash
+      - name: Extract metadata for container image
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=raw,value=${{steps.branch.outputs.name}}
+      - name: Build args
+        id: buildargs
+        run: |
+            echo "gitcommit=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT 
+            echo "builddate=$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+        with:
+          platforms: linux/amd64
+
+      - name: Login to GHCR
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push container image to ghcr
+        uses: docker/build-push-action@v4
+        with:
+          build-args: |
+              GIT_COMMIT=${{ steps.buildargs.outputs.gitcommit }}
+              BUILD_DATE=${{ steps.buildargs.outputs.builddate }}
+              IMAGE_TAG=${{ steps.branch.outputs.name }}
+          file: .k8s_ci.Dockerfile
+          push: true
+          context: .
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64
+
   build:
-    name: Build container image
+    name: Build container image for Galaxy repos
     runs-on: ubuntu-latest
     if: github.repository_owner == 'galaxyproject'
     steps:
@@ -58,3 +117,4 @@ jobs:
         uses: actions-hub/docker@master
         with:
           args: push galaxy/galaxy-min:${{ steps.branch.outputs.name }}
+