Add UptimeKuma, Searxng, Wallabag services

- Add uptime-kuma, searxng, and wallabag Docker services with Postgres integration for wallabag
- Add nginx reverse proxy location blocks for /uptime-kuma/, /searxng/, /wallabag/ in both prod and dev templates
- Update entrypoint.sh envsubst to include new HOST/PORT vars
- Add Vite dev proxy entries for all three services
- Update gitea-runner config: add self-hosted label and allow all volumes
- Add Gitea CI/CD workflow

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

vue/vite.config.js

@@ -23,6 +23,9 @@ export default defineConfig({
             "/api": "http://localhost:8080",
             "/gitea": "http://localhost:3000",
             "/radio": "http://localhost:8000",
+            "/uptime-kuma": "http://localhost:3001",
+            "/searxng": "http://localhost:8080",
+            "/wallabag": "http://localhost:80",
         },
     },
 });