Fix: Docker Tag-Format für Feature Branches (Slash Bindestrich), GitHub Actions Pipeline korrigiert

.github/workflows/docker-build.yml

@@ -24,6 +24,17 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      - name: Generate Docker tag
+        id: docker_tag
+        run: |
+          if [[ "${{ github.ref_name }}" == "main" ]]; then
+            echo "tag=main" >> $GITHUB_OUTPUT
+          else
+            # Ersetze Slashes durch Bindestriche für gültige Docker Tags
+            CLEAN_TAG=$(echo "${{ github.ref_name }}" | sed 's/\//-/g')
+            echo "tag=$CLEAN_TAG" >> $GITHUB_OUTPUT
+          fi
+
       - name: Build and push
         uses: docker/build-push-action@v5
         with:
@@ -32,5 +43,5 @@ jobs:
           tags: |
             ${{ env.IMAGE_NAME }}:latest
             ${{ env.IMAGE_NAME }}:${{ github.sha }}
-            ${{ env.IMAGE_NAME }}:${{ github.ref_name }}
+            ${{ env.IMAGE_NAME }}:${{ steps.docker_tag.outputs.tag }}
           platforms: linux/amd64