Sandbox for NPM install

This repository shows how to set up NPM packages so that these two things are both true:

1. The names and versions of dependency packages are recorded in package.json as a set of instructions for the npm install command.

2. After installation, the source code of installed packages is not picked up by version control.

This is done by adding node_modules, the name of the folder where the dependency source code lives, to the .gitignore file.

To see the results, compare the outputs below before and after installation:

$ git status
nothing to commit, working tree clean
$ ls
app.js  package.json  package-lock.json  README.md
$ npm install
added 1 package, and audited 2 packages in 384ms
$ ls
app.js  node_modules  package.json  package-lock.json  README.md
$ git status
nothing to commit, working tree clean