Update README.md

Author: chavee

README.md

@@ -24,5 +24,8 @@ npm install pm2 -g
 pm2 start node-pie
 ```
 
+## How to use
+[A basic Node-PIE tutorial in available here (Thai language).](https://docs.google.com/presentation/d/1Xv9unTv_Pm-kspFjR_jZ6_Db6_Xd3QBX1PhCA3OwadE/edit#slide=id.g34949578f4_0_109)
+
 ## Screen shot
 ![image](https://github.com/netpieio/node-pie/blob/master/docs/images/screen.png?raw=true)