Add Hatsu

[kwaa]

Thanks for taking the time to suggest an addition to awesome-selfhosted!

To ensure your Pull Request is dealt with swiftly, please check the following (check the boxes [x]):

• Submit one item per pull request. This eases reviewing and speeds up inclusion.
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• First release
• Latest commit
• Installation guide

[kokomo123]

LGTM, No issues here pending other thoughts from collaborators, thanks for your contribution!