Update readme.md

readme.md

@@ -3,3 +3,14 @@
 Update 2015-11-06
 
 Run PHPMyAdmin with alpine + php built in web server
+
+
+## Usage
+
+First， you need to run mysql in docker, and this image need link a running mysql instance container
+
+```
+docker run --name myadmin -d --link mysql_db_server:db -p 8080:8080 netroby/alpine-phpmyadmin
+```
+
+Then open browser, visit http://***.***.host.ip:8080