Investigate Verdaccio checking the internet unnecessarily

[jcowman2]

Trying to run an offline Verdaccio with a storage that was bundled by our install script often throws an error. This should be investigated to see if it's a problem with our script or a bug with Verdaccio.

Steps to reproduce:

1. Run install script on a machine that is connected to the internet (try installing react or gulp, there are likely others that will cause this)
2. After the zip file is successfully made, extract it into the storage of a global instance of Verdaccio
3. Disconnect from the internet
4. In a new node project, run npm install <package> --registry http://<verdaccio-url>, where package is one from the install script.
5. Some error will likely be thrown.

Note: There is no error when installing lodash from the offline cache. This may be because it has no dependencies.