add missing argument

Author: szarbartosz

.github/workflows/publish-ghcr.yaml

@@ -29,5 +29,5 @@ jobs:
 
       - name: Build and push docker image
         run: |
-          docker build --tag ghcr.io/szarbartosz/hedgeapp-back:$IMAGE_TAG
+          docker build --tag ghcr.io/szarbartosz/hedgeapp-back:$IMAGE_TAG .
           docker push ghcr.io/szarbartosz/hedgeapp-back:$IMAGE_TAG