Migrate netlify settings to file based config

[nitrocode]

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• I'd be willing to implement this feature (contributing guide)

Describe the user story

It would be nice to modify the netlify build settings using a file based config.

https://docs.netlify.com/configure-builds/file-based-configuration/

This will prevent us from having to bug @lkysow when needing to make netlify changes and instead turn it into infrastructure-as-code.