[FEATURE REQUEST] Add build preview to pull request

[darigovresearch]

This has been done to the precious plastic academy and is very helpful for testing that a pull request is doing what it says it should be doing

[darigovresearch]

@chrismclarke was it you that set this up?

[chrismclarke]

Yep, agree always a handy feature to have. For the pp-academy I setup this with netlify, which is a pretty good option for something that just works quickly out of the box.

I think anyone with repo access can do this by connecting their own (free) netlify account. Here's a copy of the settings I have on my personal netlify for the pp-academy (if I can remember correctly it also meant adding another siteConfig file which you can see is copied over, because github pages and netlify use slightly different base URL structures)

I'm running low on free build minutes on my netlify account, but if someone else want to try then that would be great. Other options would probably either be vercel (works similar to netlify) or firebase (probably overkill)