This post will be covering two topics, installing Bcrypt NodeJS as a dependency and prevent linking node_modules from host machine to your docker container.

Using Bcrypt package to encrypt passwords comes with a minor challenge: when installed it needs to be compiled to the operating system (OS) architecture using node-gyp, python 2.x. These prerequisite dependencies are needed to build the app on a dev machine, which needs to be documented. However, docker solves the need to communicate this in your “get started” documentation. Unfortunately this will create a problem of slow feedback loop during development.