I couldn't find a really easy way to deploy GitHub integration with Trello, so I made one.
Save this for later. This is your TRELLO_KEY.
Use that to get an OAuth token. (Add your token to the end of the URL.)
Save this for later. This is your TRELLO_TOKEN.
Create a list on Trello with a unique name. We will be adding cards to this list.
Save this for later. This is your TRELLO_LIST_NAME.
Click the deploy button below. Log in (or sign up), and hit Deploy For Free. Get the App Name.
Your URL should be something like: https://<app-name>.herokuapp.com
Save this for later. This is your Payload URL.
Go to your GitHub repo's settings.
Click Webhooks & services.
Click Add webhook.
For Payload URL, enter your Heroku App URL.
For Content type, select application/json.
For Secret, enter a super secret password that nobody else knows.
Save this for later. This is your GITHUB_SECRET.
Hit Add webhook.
Go to your Heroku Dashboard.
Click on your application.
Click Settings.
Click Reveal Config Vars.
Add each config variable (TRELLO_KEY, TRELLO_TOKEN, TRELLO_LIST_NAME, GITHUB_SECRET).
Cards should show up in TRELLO_LIST_NAME whenever you push!