ci: add Forgejo Actions deploy workflow

.forgejo/workflows/deploy.yml

@@ -0,0 +1,19 @@
+name: Build and Deploy
+on:
+  push:
+    branches: [main]
+
+jobs:
+  deploy:
+    runs-on: self-hosted
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build site
+        run: python3 build.py
+
+      - name: Deploy to nginx docroot
+        run: |
+          rsync -av --delete site/ /home/opc/zai-home-base/sites/helpme-tips/
+          echo "Deployed at $(date)"