Add Forgejo Actions workflow for auto-deploy

.forgejo/workflows/deploy.yml

@@ -0,0 +1,21 @@
+name: Build and Deploy Blog
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-deploy:
+    runs-on: self-hosted
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Build
+        run: hugo --minify
+
+      - name: Deploy
+        run: |
+          rsync -av --delete public/ /srv/web/blog.holoshaii.dev/public/