Add CUSTOM_TOKEN_SECRET to .env.example
Add CUSTOM_TOKEN_SECRET to .env.example

SkygearIO/skygear-server,rickmak/skygear-server,rickmak/skygear-server,rickmak/skygear-server,SkygearIO/skygear-server,SkygearIO/skygear-server,SkygearIO/skygear-server