add wrangler docs

Author: domenkozar

docs/wrangler.jsonc

@@ -0,0 +1,10 @@
+{
+  "$schema": "node_modules/wrangler/config-schema.json",
+  "name": "my-astro-app",
+  // Update to today's date
+  "compatibility_date": "2025-03-25",
+  "assets": {
+    "directory": "./dist",
+    "not_found_handling": "404-page" // If you have a custom `src/pages/404.astro` page
+  }
+}