Understanding dependencies inside your Package.json
In this blog post, you can find a list and description of dependencies and other host Specs inside package.json. The dependencies in your project's package.json allow the project to install the versions of the modules it depends on. By running an install command inside a project, you can install all of the dependencies listed in the project's package.json, meaning they don't have to be (and rarely should be) bundled with the project itself.