Contributing.md should mention formatting and linting

[LarsDenBakker]

We should improve the section in contributing.MD which mentions which commands to run before pushing (yarn format, yarn lint etc.) and explain some more information around prettier, type linting and the version linting we have.

[stale[bot]]

Hi everyone! Seems like there hasn't been much going on in this issue lately. If there are still questions, comments, or bugs, please feel free to continue the discussion. Unfortunately, we don't have time to get to every issue. We are always open to contributions so please send us a pull request if you would like to help. Inactive issues will be closed after 30 days. Thanks!

[Bhavyaatrivedi]

Hi can you assign this issue to me.