feat: add cloudflare workers deployment

src/lib/runtime/cloudflare.ts

@@ -0,0 +1,15 @@
+import { getCloudflareContext } from "@opennextjs/cloudflare";
+
+export interface AppCloudflareEnv {
+  DB?: D1Database;
+  EXPORT_BUCKET?: R2Bucket;
+  API_ACCESS_KEY?: string;
+}
+
+export function getAppCloudflareEnv(): AppCloudflareEnv | null {
+  if (process.env.APP_RUNTIME !== "cloudflare") {
+    return null;
+  }
+
+  return getCloudflareContext().env as AppCloudflareEnv;
+}