docker image labels

.github/workflows/build_docker_image.yml

@@ -54,6 +54,18 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
       
+      - name: Define metadata variables
+        run: |
+          sed -i "s/ARG githash=.*/ARG githash=${{ github.sha }}/" Dockerfile
+          sed -i "s/ARG created=.*/ARG created=$(date -u +'%Y-%m-%dT%H:%M:%S%:z')/" Dockerfile
+          cat Dockerfile
+      
+      - name: Define metadata variables
+        if: startsWith(github.ref, 'refs/tags/v')
+        run: |
+          sed -i "s/ARG version=.*/ARG version=${{ github.ref_name }}/" Dockerfile
+          cat Dockerfile
+      
       - name: Extract metadata for release Docker image
         if: startsWith(github.ref, 'refs/tags/v')
         id: meta