flow like the river

BACK_BACK/node_modules/get-port/readme.md

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+# get-port [![Build Status](https://travis-ci.org/sindresorhus/get-port.svg?branch=master)](https://travis-ci.org/sindresorhus/get-port)
+
+> Get an available port
+
+
+## Install
+
+```
+$ npm install get-port
+```
+
+
+## Usage
+
+```js
+const getPort = require('get-port');
+
+getPort().then(port => {
+	console.log(port);
+	//=> 51402
+});
+```
+
+Optionally, pass in a preferred port:
+
+```js
+getPort({port: 3000}).then(port => {
+	console.log(port);
+	// Will use 3000 if available, otherwise fall back to a random port
+});
+```
+
+
+## API
+
+### getPort([options])
+
+Returns a `Promise` for a port number.
+
+#### options
+
+Type: `Object`
+
+##### port
+
+Type: `number`
+
+The preferred port to use.
+
+##### host
+
+Type: `string`
+
+The host on which port resolution should be performed. Can be either an IPv4 or IPv6 address.
+
+
+## Related
+
+- [get-port-cli](https://github.com/sindresorhus/get-port-cli) - CLI for this module
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)