ここからは公式に従う。
https://github.com/mastodon/mastodon/releases/tag/v4.1.0
mastodon@server:~/live$ git fetch
mastodon@server:~/live$ git checkout v4.1.0
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
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