[Vuejs]-Heroku nuxt production deployment is using staging config vars

The way I got around this issue was by creating a separate heroku app for staging using staging config vars (no pipeline). I then create a pipeline for production, with a production-staging app and production-live app, using production config vars for both.

Once i’ve tested the staging app, I then push to production-staging where the app is build and finally promote to production-live.