changed Github actions to use branch name as tag

Author: mmahipal

.github/workflows/github-actions.yml

@@ -10,7 +10,7 @@ env:
   # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io
   # github.repository as <account>/<repo>
-  IMAGE_NAME: ${{ github.repository }}
+  IMAGE: ${{ github.repository }}
 
 
 jobs:
@@ -35,13 +35,26 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      # extract branch name
+      - name: Extract branch name
+        if: github.event_name != 'pull_request'
+        shell: bash
+        run: echo "::set-env name=BRANCH_NAME::$(echo ${GITHUB_REF#refs/heads/})"
+        id: extract_branch
+
+      # extract branch name on pull request
+      - name: Extract branch name
+        if: github.event_name == 'pull_request'
+        run: echo "::set-env name=BRANCH_NAME::$(echo ${GITHUB_HEAD_REF})"
+
       # Build and push Operator image (don't push on PR)
       - name: Build and push Docker image
         run:  |
           make generate
           make manifests
-          IMAGE=${${{ env.IMAGE_NAME }},,}
-          make docker-build IMG="${{ env.REGISTRY }}/${IMAGE}:${GITHUB_REF##*/}"
-          docker push "${{ env.REGISTRY }}/${IMAGE}:${GITHUB_REF##*/}"
-          docker rmi "${{ env.REGISTRY }}/${IMAGE}:${GITHUB_REF##*/}" && docker system prune -f
+          IMAGE_NAME=${{ env.IMAGE }}
+          IMAGE_NAME=${IMAGE,,}
+          make docker-build IMG="${{ env.REGISTRY }}/${IMAGE_NAME}:${BRANCH_NAME}"
+          docker push "${{ env.REGISTRY }}/${IMAGE_NAME}:${BRANCH_NAME}"
+          docker rmi "${{ env.REGISTRY }}/${IMAGE_NAME}:${BRANCH_NAME}" && docker system prune -f
           rm -rf bin/