Update: README, bump version to 2.3.9

Author: dgilling

README.md

@@ -51,6 +51,37 @@ app.use(moesifExpress(options));
 ### 2. Enter Moesif Application Id.
 You can find your Application Id from [_Moesif Dashboard_](https://www.moesif.com/) -> _Top Right Menu_ -> _App Setup_
 
+## Not using Express?
+If you're not using the express framework, you can still use this library.
+The library does not depend on express, so you can still call the middleware from a basic HTTP server.
+
+```javascript
+var moesifExpress = require('moesif-express');
+const http = require('http');
+
+var options = {
+  applicationId: 'Your Application Id'
+};
+
+var server = http.createServer(function (req, res) {
+  moesifExpress(options)(req, res, function () {
+    // Callback
+  });
+
+  req.on('end', function () {
+
+    res.write(JSON.stringify({
+      message: "hello world!",
+      id: 2
+    }));
+    res.end();
+  });
+});
+
+server.listen(8080);
+
+```
+
 ## Configuration options
 
 
@@ -245,8 +276,8 @@ moesifMiddleware.updateUser(user, callback);
 
 ```
 
-The metadata field can be any custom data you want to set on the user. 
-The userId field is required. 
+The metadata field can be any custom data you want to set on the user.
+The userId field is required.
 
 
 ## Other integrations

lib/index.js

@@ -118,7 +118,9 @@ module.exports = function (options) {
       logEvent(resBodyBuf, req, res, options, moesifController);
     };
 
-    next();
+    if (next) {
+      next();
+    }
   };
 
   moesifMiddleware.updateUser = function (userModel, cb) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "moesif-express",
-  "version": "2.3.8",
+  "version": "2.3.9",
   "description": "Collection/Data Ingestion Middleware for Express",
   "main": "./lib/index.js",
   "keywords": [