Actually run Hugo to build the site

.forgejo/workflows/image.yaml

@@ -8,6 +8,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - name: Run the build process with Docker
+        uses: addnab/docker-run-action@v3
+        with:
+          image: docker.io/hugomods/hugo:latest
+          options: -v ${{ github.workspace }}:/src
+          run: |
+            hugo
       - uses: docker/metadata-action@v5
         id: metadata
         with: