middleware docs

lib/local-web-server.js

@@ -246,7 +246,6 @@ function loadModule (modulePath) {
   return module
 }
 
-
 function getIPList () {
   const flatten = require('reduce-flatten')
   const os = require('os')

lib/middleware.js

@@ -0,0 +1,14 @@
+'use strict'
+
+class Middleware {
+  /**
+   * Return one or more options definitions to collect command-line input
+   * @returns {OptionDefinition|OptionDefinition[]}
+   */
+  optionDefinitions () {}
+
+  /**
+   * Return one of more middleware functions with three args (req, res and next). Can be created by express, Koa or hand-rolled.
+   */
+   middleware (localWebServer) {}
+}