fix?

.github/workflows/create-publish-docker-image.yml

@@ -19,9 +19,16 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
 
-      - name: Exit if not on main branch
-        if: endsWith(github.event.base_ref, 'main') == false
-        run: exit -1
+      - name: Get current branch and exit if not main
+        run: |
+          raw=$(git branch -r --contains ${{ github.ref }})
+          branch=${raw##*/}
+          echo "{name}=branch" >> $GITHUB_OUTPUT
+          echo "Branch is $branch."
+          if [ "$branch" != "main" ]; then
+            echo "Not on main branch, exiting."
+            exit 0
+          fi
 
       - name: Log in to the Container registry
         uses: docker/login-action@v2