You can install the npm package for dependument-cli with a single command:
$ npm install -g dependument-cli
You will need to have administrative privileges for this, because it has to be installed globally. So either run the terminal as an administrator, or use sudo.
dependument-cli itself doesn't need any administrative privileges. npm requires administrator privileges to install a package globally...
dependument-cli needs to be installed globally (with the -g argument) so that you can run it (easily) from the command line.
The basic usage of the CLI is a simple, parameterless command:
$ dependument
This command reads dependencies from package.json and outputs the dependencies to DEPENDENCIES.md.
Dependument is (un)licensed under The Unlicense. Do what you like with it.
To see the full license text included with the project, you can read the LICENSE file.