Add proxy config usage

README.md

@@ -255,6 +255,33 @@ Scenario('test some forms', (I, docsPage) => {
 });
 ```
 
+## Connect through proxy
+
+CodeceptJS also provides flexible options when you want to execute tests to Selenium servers through proxy. You will
+need to update the `helpers.WebDriverIO.proxy` key.
+
+```js
+{
+    "helpers": {
+        "WebDriverIO": {
+            "proxy": {
+                "proxyType": "manual|pac",
+                "proxyAutoconfigUrl": "URL TO PAC FILE",
+                "httpProxy": "PROXY SERVER",
+                "sslProxy": "PROXY SERVER",
+                "ftpProxy": "PROXY SERVER",
+                "socksProxy": "PROXY SERVER",
+                "socksUsername": "USERNAME",
+                "socksPassword": "PASSWORD",
+                "noProxy": "BYPASS ADDRESSES"
+            }
+        }
+    }
+}
+```
+
+Please refer to [Selenium - Proxy Object](https://code.google.com/p/selenium/wiki/DesiredCapabilities#Proxy_JSON_Object) for more information.
+
 ## Current State
 
 CodeceptJS is in its early days. Any feedback, issues, and pull requests are welcome. Try it, and if you like it - help us make it better!