feat: add Easypanel persistent volume support for Astro DB

- Change Dockerfile from nginx (static) to Node.js (SSR)
- Add @astrojs/node adapter for SSR mode
- Add OUT_DIR=/data for persistent SQLite storage
- Add .env.example with persistent storage config
- Update README with Easypanel deployment instructions
- Database persists across redeployments at /data/astro.db

skills/website-creator/templates/astro-tina-starter/.env.example

@@ -0,0 +1,17 @@
+# Astro + Tina CMS Environment Variables
+
+# Site URL
+PUBLIC_SITE_URL=https://your-domain.com
+
+# Tina CMS (optional - for production Tina admin)
+TINA_TOKEN=your-tina-token-from-tina-cloud
+TINA_CLIENT_ID=your-client-id
+
+# Astro DB - Persistent Storage
+# IMPORTANT: Set OUT_DIR to /data for Docker/Easypanel persistent volume
+# This ensures database persists across redeployments
+OUT_DIR=/data
+
+# Optional: External Turso database (if using external DB instead of local SQLite)
+# TURSO_DATABASE_URL=libsql://your-db.turso.io
+# TURSO_AUTH_TOKEN=your-auth-token