Update README.md

Feng Honglin · Feng Honglin · commit add1cff4b955 · 2016-03-17T15:29:45.000+01:00
diff --git a/README.md b/README.md
@@ -1,6 +1,8 @@
 tutum-docker-mysql
 ==================
 
+**This image will be deprecated soon. Please use the docker official image:** https://hub.docker.com/_/mysql/
+
 [![Deploy to Tutum](https://s.tutum.co/deploy-to-tutum.svg)](https://dashboard.tutum.co/stack/deploy/)
 
 Base docker image to run a MySQL database server
