Fatal: Not a git repository (or any parent up to mount point /discourse)

Thank you for your attention

Q :Are you trying to add the discourse-rating plugin to your production site? Did you try this? Install Plugins in Discourse

Re : It’s no use triying
I don’t have app.yml
I have a development environment

Q : Are you trying to change how Discourse works? See Beginner’s Guide to Creating Discourse Plugins - Part 1
Re : I am not trying