add install

Author: xuanskyer

README.md

@@ -3,3 +3,26 @@
 
 A websocket service class, based on the php extension of swoole
 
+## Installation via Composer
+
+> The recommended method  is through [Composer](https://getcomposer.org/doc/00-intro.md).
+
+* Install [composer](https://getcomposer.org/doc/00-intro.md#installation-linux-unix-osx)
+
+* Add **swoole-websocket-server** as a dependency in your project's composer.json file (change version to suit your version):
+
+```
+    {
+        "require": {
+            "furthestworld/swoole-websocket-server": "^1.0"
+        }
+    }
+```
+
+* composer update  in your project
+
+```
+  composer clear-cache && composer update
+```
+
+