I am working on a project where I need to join two .env variables to create a third one. The reason as to why I don’t just make the first one the way I need it is because I would have to manually update the credentials in every heroku app whenever the credentials are rotated. While on the other apps it’s not an issue as I can just call:

db_uri=`${process.env.db_url}?schema=${process.env.db_schema}`

There is one app where this solution brings about multiple bugs due to Prisma ORM limitations.

I want to know if there is some type of syntax that can be used for the heroku platform and for the dotenv node package to do something like this:
.env

db_url = my_db_url
db_schema = my_schema
db_url_w_schema = $db_url?schema=$db_schema