eslint 8.57.0 to 9.x.x

[nsano-rururu]

• praeco
• elastalert-server

(node:62115) ESLintIgnoreWarning: The ".eslintignore" file is no longer supported. Switch to using the "ignores" property in "eslint.config.js": https://eslint.org/docs/latest/use/configure/migration-guide#ignoring-files
(Use `node --trace-warnings ...` to show where the warning was created)

Oops! Something went wrong! :(

ESLint: 9.8.0

ESLint couldn't find an eslint.config.(js|mjs|cjs) file.

From ESLint v9.0.0, the default configuration file is now eslint.config.js.
If you are using a .eslintrc.* file, please follow the migration guide
to update your configuration file to the new format:

https://eslint.org/docs/latest/use/configure/migration-guide

If you still have problems after following the migration guide, please stop by
https://eslint.org/chat/help to chat with the team.

[nsano-rururu]

https://qiita.com/Shilaca/items/c494e4dc6b536a5231de
https://zenn.dev/keita_hino/articles/798bf62c6db663
https://zenn.dev/makotot/articles/0d9184f3dde858
https://qiita.com/KokiSakano/items/e4cd51b85ca0be3ef574
https://ma-vericks.com/blog/eslint-flat-config/
https://blog.nnn.dev/entry/2023/10/19/110000
https://www.docswell.com/s/t__keshi/ZGXXV8-eslint-flat-config
https://dackdive.hateblo.jp/entry/2024/06/25/100000
https://tech.every.tv/entry/2023/12/21/152848
https://madogiwa0124.hatenablog.com/entry/2024/04/07/111412
https://t28.dev/blog/eslint-blog-about-flat-config/
https://www.sunapro.com/eslint-flat-config/

[nsano-rururu]

https://eslint.org/docs/latest/use/configure/migration-guide