Set And Show Heroku Env Variables

The heroku CLI includes the config command which will show all the env variables for the current app.

$ heroku config
=== my-app Config Vars

At this point I have none set.

I can set one with the config:set command and a key-value parameter.

$ heroku config:set PUBLIC_NEXT_URL=http://localhost:1235
Setting PUBLIC_NEXT_URL and restarting ⬢ my-app... done, v3
PUBLIC_NEXT_URL: http://localhost:1235

I can see the value that this specific variable is set to by calling it with config:get.

$ heroku config:get PUBLIC_NEXT_URL
http://localhost:1235