It's free and cool :D

• Create an app on Discord Devlopers Portal
• Go to OAuth2 and copy the CLIENT ID
• Open config.json replace where it says applicationID at the bottom with the Client ID you copied

Once you have done that you can start adding images for your Rich Presence

• Navigate back to the Discord Devlopers Portal
• Press Rich Presence in your application then
• Click Art Assets then scroll down and you will see Add Image(s)
• Click that then chose an image and name
• Click Save to save your changes

(excluding APP Name read above for info)

(The image sections in the config.json would be the names of the images you uploaded to your app on Discord Devlopers Portal

• Fork the repository
• Go to https://www.replit.com
• Create an account
• Fork your project at https://replit.com/github
• Edit config.json
• Go to "Secrets environment variables"
• Create the variable TOKEN and put your token
• RUN