 a &quot;start&quot; command that then referenced the
<code>npm_package_config_port</code> environment variable, then the user could
override that by doing <code>npm config set foo:port 8001</code>.</p>
<p>See <code><a href="../misc/npm-config.html">npm-config(7)</a></code> and <code><a href="../misc/npm-scripts.html">npm-scripts(7)</a></code> for more on package
configs.</p>
<h2 id="dependencies">dependencies</h2>
<p>Dependencies are specified in a simple object that maps a package name to a
version range.