Added HTTPS support, port deprecated

@@ -16,8 +16,6 @@ Monitor can be configured by passing options object into `expressMonitor` constr
 Default config:
 ```
 path: '/status',
-socketPort: 41338, // Port for Socket.io communication,
-useHttps: false,   // Force HTTPS protocol instead of HTTP
 spans: [{
   interval: 1,     // Every second
   retention: 60    // Keep 60 datapoints in memory

@@ -136,7 +136,7 @@
   Chart.defaults.global.elements.line.borderColor = "rgba(0,0,0,0.9)";
   Chart.defaults.global.elements.line.borderWidth = 2;
 
-  var socket = io('{{protocol}}'+ '://' + window.location.hostname + ':{{port}}');
+  var socket = io(location.protocol + '//' + location.hostname + ':' + location.port);
   var defaultSpan = 0;
   var spans = [];
 

@@ -6,11 +6,10 @@
   const os = require('os');
   const onHeaders = require('on-headers');
   const pidusage = require('pidusage');
+  let io;
 
   const defaultConfig = {
-    socketPort: 41338,
     path: '/status',
-    useHttps: false,
     spans: [{
       interval: 1,
       retention: 60
@@ -73,29 +72,17 @@
       config.path = defaultConfig.path;
     }
 
-    if (config.socketPort === undefined || !config instanceof Number) {
-      config.socketPort = defaultConfig.socketPort;
-    }
-
     if (config.spans === undefined || !config instanceof Array) {
       config.spans = defaultConfig.spans;
     }
 
-    const io = require('socket.io')(config.socketPort);
-
-    fs.readFile(path.join(__dirname, 'index.html'), 'utf8', (err,data) => {
-      if (err) throw new Error(err);
-    
-      var result = data.replace(/{{port}}/g, config.socketPort).replace(/{{protocol}}/g, config.useHttps ? 'https' : 'http');
+    return (req, res, next) => {
+      if (io === null || io === undefined) {
         
-      fs.writeFile(path.join(__dirname, 'index.rendered.html'), result, 'utf8', (err) => {
-        if (err) throw new Error(err);
-      });
-    });
+        io = require('socket.io')(req.socket.server);
 
         io.on('connection', (socket) => {
           socket.emit('start', config.spans);
-
           socket.on('change', function() { socket.emit('start', config.spans); });
         });
 
@@ -104,11 +91,11 @@
           span.responses = [];
           setInterval(() => gatherOsMetrics(io, span), span.interval * 1000);
         });
+      }
 
-    return (req, res, next) => {
       const startTime = process.hrtime();
       if (req.path === config.path) {
-        res.sendFile(path.join(__dirname + '/index.rendered.html'));
+        res.sendFile(path.join(__dirname + '/index.html'));
       } else {
         onHeaders(res, () => {
           const diff = process.hrtime(startTime);

 {
   "name": "express-status-monitor",
-  "version": "0.0.8",
+  "version": "0.0.9",
   "description": "Monitoring for Express-based Node applications",
   "main": "app.js",
   "keywords": [