remove docker push image from backend in favor of docker image from dedicated action file

.github/workflows/backend_tests.yml

@@ -297,49 +297,3 @@ jobs:
         with:
           name: pr_number
           path: pr/
-
-  build-and-push-image:
-    needs: coverage
-    if: ${{ github.ref_name == 'main' && github.event_name == 'push' }}
-    env:
-      REGISTRY: ghcr.io
-      IMAGE_NAME: sartography/spiffworkflow-backend
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-
-    steps:
-      - name: Check out the repository
-        uses: actions/checkout@v3.3.0
-        with:
-          # Disabling shallow clone is recommended for improving relevancy of reporting in sonarcloud
-          fetch-depth: 0
-      - name: Get current date
-        id: date
-        run: echo "date=$(date +%s)" >> $GITHUB_OUTPUT
-      - name: Log in to the Container registry
-        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-
-      - name: Build and push Docker image
-        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
-        env:
-          # if we ever support more than main we will need to format the ref name
-          # like sub '/' with '-'
-          TAG: ${{ github.ref_name }}-${{ steps.date.outputs.date }}
-        with:
-          # this action doesn't seem to respect working-directory so set context
-          context: spiffworkflow-backend
-          push: true
-          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}
-          labels: ${{ steps.meta.outputs.labels }}