ci: add Gitea Actions workflow for auto-deploy to OCI on main push

.gitea/workflows/deploy.yml

@@ -0,0 +1,19 @@
+name: Deploy to OCI
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: self-hosted
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install frontend dependencies
+        run: cd web && npm ci
+
+      - name: Deploy to OCI
+        run: make deploy-oci