add better examples with local echo server

examples/server.js

@@ -1,12 +1,14 @@
 const WebSocket = require('ws')
 
+console.log('open the file ' + process.cwd() + '/examples/example.html in a browser')
 const wss = new WebSocket.Server({ port: 8080 })
 
 wss.on('connection', function connection (ws) {
  console.log('connection')
  ws.on('message', function incoming (message) {
  console.log('received: %s', message)
+ ws.send(message)
+ console.log('echoed back...')
  })
 
- ws.send('something')
 })

examples/simple.js

@@ -2,12 +2,12 @@
 // Define the 'before' and 'after' hooks as you wish.
 
 wsHook.before = function (data, url) {
- data = 'modified data'
+ data = 'modified data while sending'
  return data
 }
 
 wsHook.after = function (messageEvent, url) {
- messageEvent.data = '-- data modified -- ' + messageEvent.data + ' --'
+ messageEvent.data = messageEvent.data + ' and receiving'
  return messageEvent
 }
 

package.json

@@ -14,7 +14,7 @@
  "standard": "^10.0.3"
  },
  "scripts": {
- "test": "node examples/server.js"
+ "example": "node examples/server.js"
  },
  "repository": {
  "type": "git",