docs(cloudflare): add global_fetch_strictly_public to get started (#133)

Author: vicb

pages/cloudflare/get-started.mdx

@@ -50,7 +50,14 @@ You can create one yourself in the root directory of your Next.js app with the n
   "main": ".open-next/worker.js",
   "name": "my-app",
   "compatibility_date": "2024-12-30",
-  "compatibility_flags": ["nodejs_compat"],
+  "compatibility_flags": [
+    // Enable Node.js API
+    // see https://developers.cloudflare.com/workers/configuration/compatibility-flags/#nodejs-compatibility-flag
+    "nodejs_compat",
+    // Allow to fetch URLs in your app
+    // see https://developers.cloudflare.com/workers/configuration/compatibility-flags/#global-fetch-strictly-public
+    "global_fetch_strictly_public",
+  ],
   "assets": {
     "directory": ".open-next/assets",
     "binding": "ASSETS",