add possibility to add image version

.gitea/workflows/publish-docker.yaml

@@ -1,6 +1,12 @@
 name: Publish docker workflow
 on:
   workflow_call:
+    inputs:
+      build_args:
+        description: Optional docker build args. If VERSION is provided, it is also used as image tag.
+        required: false
+        type: string
+        default: ''
 jobs:
   publish_docker:
     name: Build and publish docker image
@@ -8,18 +14,37 @@ jobs:
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4
+
       - name: Setup docker buildx environment
         uses: docker/setup-buildx-action@v3
+
       - name: Login to docker registry
         uses: docker/login-action@v3
         with:
           registry: ${{ vars.CONTAINER_REGISTRY_URL }}
           username: ${{ vars.CONTAINER_REGISTRY_USERNAME }}
           password: ${{ secrets.CONTAINER_REGISTRY_TOKEN }}
+
+      - name: Resolve docker tag
+        id: resolve_tag
+        shell: bash
+        env:
+          INPUT_BUILD_ARGS: ${{ inputs.build_args }}
+        run: |
+          VERSION="$(printf '%s\n' "${INPUT_BUILD_ARGS}" | sed -n 's/^VERSION=//p' | head -n 1)"
+          echo "Using VERSION: ${INPUT_BUILD_ARGS}"
+          if [ -n "${VERSION}" ]; then
+            IMAGE_TAG="${VERSION}"
+          else
+            IMAGE_TAG="latest"
+          fi
+          echo "image_tag=${IMAGE_TAG}"
+
       - name: Build and push docker image
         uses: docker/build-push-action@v5
         with:
           context: .
           file: ./Dockerfile
           push: true
-          tags: "${{ vars.CONTAINER_REGISTRY_URL }}/${{gitea.repository}}:latest"
+          build-args: ${{ inputs.build_args }}
+          tags: "${{ vars.CONTAINER_REGISTRY_URL }}/${{ gitea.repository }}:${{ steps.resolve_tag.outputs.IMAGE_TAG }}"