* Add `make nuke` which removes ALL build output/caches/etc
  (everything that is `.gitignore`d).

* Add `-v` flag to `xargs` in `make devnet-clean` so that it doesn't error when
  there are no volumes or images to delete.

* If `nvm` is installed, emit `nvm use` before compiling js.

* Add `yarn install` to `build-ts`.
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>