Add in Cloudflare Adapter

Preparations for deployment

src/app.d.ts

@@ -6,7 +6,15 @@ declare global {
     // interface Locals {}
     // interface PageData {}
     // interface PageState {}
-    // interface Platform {}
+    interface Platform {
+      env: {
+        COUNTER: DurableObjectNamespace;
+      };
+      context: {
+        waitUntil(promise: Promise<any>): void;
+      };
+      caches: CacheStorage & { default: Cache };
+    }
   }
 }