https://stackoverflow.com/questions/25848475/unable-to-install-npm-bcrypt-on-ubuntu
apt-get install node-gyp
Mac
https://github.com/nodejs/node-gyp/blob/master/macOS_Catalina.md
- install node-gyp v7 global
- This issue is caused by https://www.npmjs.com/package/bcrypt and in this link suggest use version >=3.0.6 for node >=12