Given that this is meant to be boilerplate for building apps, it makes sense to install it with devDependencies. However, let's go along and install it with the `--production` flag. It doesn't get much rosier. Close to 1M SLOC.
- TypeScript, CoffeeScript, C/C++ headers/source files, basically any language other than JavaScript, are probably part of that modules source, and not the compiled JS output that is used.