diff --git a/.gitea/workflows/docker-build-push.yml b/.gitea/workflows/docker-build-push.yml
index a819418..ba8948c 100644
--- a/.gitea/workflows/docker-build-push.yml
+++ b/.gitea/workflows/docker-build-push.yml
@@ -26,17 +26,16 @@ jobs:
       - name: Build image
         env:
           IMAGE_NAME: ${{ vars.DOCKERHUB_REPOSITORY }}
-        run:
+        run: |
+          test -n "$IMAGE_NAME"
           SHORT_SHA="$(git rev-parse --short HEAD)"
-          docker build \
-            --tag "$IMAGE_NAME:latest" \
-            --tag "$IMAGE_NAME:$SHORT_SHA" \
-            .
+          docker build -t "$IMAGE_NAME:latest" -t "$IMAGE_NAME:$SHORT_SHA" .
 
       - name: Push image
         env:
           IMAGE_NAME: ${{ vars.DOCKERHUB_REPOSITORY }}
-        run:
+        run: |
+          test -n "$IMAGE_NAME"
           SHORT_SHA="$(git rev-parse --short HEAD)"
           docker push "$IMAGE_NAME:latest"
           docker push "$IMAGE_NAME:$SHORT_SHA"