`ghost install --verbose` leads to `Message: stdout maxBuffer exceeded`

[tianon]

This is similar to #801, but on ghost install --verbose 😅

We were trying to get better logs from yarn install because the default of zero useful output from it is frankly rubbish, so we were trying to pipe --verbose down to the yarn install command. In doing so, we found that --verbose on ghost install does the trick, but then the install always fails with Message: stdout maxBuffer exceeded because yarn install --verbose is actually way too verbose. 😭😂

Any suggestions for a middle ground? Maybe something that would show things like sqlite3 failing to install (with useful logs), but not necessarily a log of every. single. http. request. yarn. makes. 😂

cc @yosifkit