Change Auto deploy review database

How Can I change the review database?

I’m running Auto-devops on gitlab.com and I’d like to change the database which is used in the review cluster. I’m not sure how to go about this.

Basically at the moment gitlab comes with an in cluster postgresql database. I would need to use a postgres extension which does not come in the postgres image, postgis. There is however a postgis/postgis image which is drop in replaceable.

How can i configure the deploy to use that image instead for the deploy cluster?