chore: worker setup for docs

apps/docs/workers/app.ts

@@ -0,0 +1,23 @@
+import { createRequestHandler } from 'react-router';
+
+declare module 'react-router' {
+  export interface AppLoadContext {
+    cloudflare: {
+      env: Env;
+      ctx: ExecutionContext;
+    };
+  }
+}
+
+const requestHandler = createRequestHandler(
+  () => import('virtual:react-router/server-build'),
+  import.meta.env.MODE
+);
+
+export default {
+  fetch(request, env, ctx) {
+    return requestHandler(request, {
+      cloudflare: { env, ctx }
+    });
+  }
+} satisfies ExportedHandler<Env>;