Add forgejo action CI

.forgejo/workflows/test.yml

@@ -0,0 +1,16 @@
+on:
+  push:
+    branches:
+      - "**"
+      - "!main"
+jobs:
+  docker-build-only:
+    runs-on: cth-ubuntu-latest
+    steps:
+      - name: set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: build image (build only)
+        uses: docker/build-push-action@v6
+        with:
+          push: false
+          tags: faercol/hugo-relie:latest