プロセスを終了させる方法 (exit) 参考： How to Exit in Node.js | Stack Abuse How to exit a Node.js script | Code Maven finally 参考： A strange behavior of Node.js: program exit 0 inside `try{}` block without run `finally {}` block · Issue #19929 · nodejs/node – GitHub Issues 参考： Node.js hangs at process.exit() under certain circumstance · Issue #17872 · nodejs/node – GitHub