Not able to run @loopback/socketio example

Describe the bug

I am not able to run socket io example end to end

1. I tried via cli example it though error which is attached in logs
2. manually created same example but it throws cors error
3. example doesn't have rest & socketio combined example

Can you please give me running example of loopback 4 socket io which contains rest api as well?

Logs

lb4 example
? What example would you like to clone? socketio
✖ An error occured while running loopback4:example#downloadAndExtract
(node:3894) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, rename '/Users/saurabhmanchanda/Documents/Work/Personal/loopback4-example-socketio/tsconfig.build.json' -> '/Users/saurabhmanchanda/Documents/Work/Personal/loopback4-example-socketio/tsconfig.json'
(Use `node --trace-warnings ...` to show where the warning was created)
(node:3894) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:3894) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Additional information

No response

Reproduction

https://github.com/loopbackio/loopback-next/tree/master/examples/socketio

examples/socketio から開始し、socketio オプションを使って lb4 example で失敗を再現します。example の tsconfig.build.json と、CLI のダウンロード／展開のエントリポイントを調査します。完了の条件は、報告された ENOENT または CORS の失敗なしに example をエンドツーエンドでダウンロードして実行でき、REST と Socket.IO を同時に利用できることです。