This is great, but desperately needs a way to also fix these issues. And all functionality should run locally as well.
I imagine the latter is possible thanks to it being a docker image.
So far I've been using this script I built for similar purposes:
https://gist.github.com/silviogutierrez/3dca60a6b5b8fe214052...
Runs locally, and only on changed files against master. Fixes all my python, JS, yaml, terraform, etc. And you can run it against a single file too so I integrated it with vim to replace all my linters.
I really hope the GitHub initiative projects takes off as a standard API (à la language server) for linters and fixers. Seems every single IDE needs to reinvent a plugin for applying a specific linter.