Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -62,6 +62,19 @@ Be willing to comment on the good points and not just the things you want fixed
 	- Are there any omissions or gaps?
 	- Does it check for anomalies?
 
+## Merge
+For now, basically only @syuilo has the authority to merge PRs into develop because he is most familiar with the codebase.
+However, minor fixes, refactoring, and urgent changes may be merged at the discretion of a contributor.
+
+## Release
+For now, basically only @syuilo has the authority to release Misskey.
+However, in case of emergency, a release can be made at the discretion of a contributor.
+
+### Release Instructions
+1. commit version changes in the `develop` branch ([package.json](https://github.com/misskey-dev/misskey/blob/develop/package.json))
+2. follow the `master` branch to the `develop` branch.
+3. Create a [release of GitHub](https://github.com/misskey-dev/misskey/releases)
+
 ## Localization (l10n)
 Misskey uses [Crowdin](https://crowdin.com/project/misskey) for localization management.
 You can improve our translations with your Crowdin account.