expose error logs to customers

[fool]

when prerender fails to do a thing, it sometimes says something useful, like "hey you can't use function X". Would be great to show them to customers, somehow, even if only in a build log or via API endpoint or some async method (hit API endpoint, get email).

also tracking as https://github.com/netlify/product/issues/56

[Loque-]

This would have saved me a lot of time. I love the fact Netlify provides pre-rendering, but I lost a fair amount of time on this. Thank you for making this github project available so I could debug the issues I ran into.

Prerendering was not working for me on Netlify because phantomJS (as it is) can not digest create-react-app (due to missing polyfills). Something detailing this failure would have saved me time/minor-sanity for sure.

[github-actions]

This issue has been automatically marked as stale because it has not had activity in 1 year. It will be closed in 7 days if no further activity occurs. Thanks!