Format workflow

.forgejo/workflows/build.yaml

@@ -1,17 +1,23 @@
+name: Build Docker image
+
 on: [push]
+
 jobs:
   build_image:
     name: Build and publish image
     runs-on: docker
+
     steps:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+
       - name: Login to Docker registry (Forgejo)
         uses: docker/login-action@v3
         with:
           registry: git.korhonen.cc
           username: ${{ secrets.REGISTRY_USER }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
+
       - name: Build and push image
         uses: docker/build-push-action@v5
         with: