Being unable to ignore node_modules directories.

- There's no need to sync these directories. They can be recreated very quickly via `npm install` but the tons of tiny files take forever to sync.

- In addition, Dropbox locks these files causing npm to fail. So I often found myself pausing Dropbox just so I could use npm.

Fortunately, I found two solutions:

1. A script to tell DB to ignore node_modules directories based on: https://stackoverflow.com/a/69655523/117030

2. OR https://www.insynchq.com/ can be configured with .gitignore-style rules.