Help me to setup this script

I have a static website builder called updog. Please help me to setup it on heroku. I setup partially it. http://static-keralahost.herokuapp.com/ but tweeking is not done. Help me to add site key, secret key etc of dropbox and google drive and another tweaking also needed. here is the link to the script. https://drive.google.com/file/d/1QmINCg9HySqCqgJh1D-6Y9E93POFdsyB/view?usp=sharing

Please tell me what environment variables have to setup for this. Thanks.