I really like the pipelines feature in Heroku. Being able to automatically deploy to a staging environment from main and then be able to promote that exact slug to production is pretty cool. I’ve yet to find a tool that has replicated that experience or something like it without getting in the weeds with Docker.

As far as I know it’s not possible to have separate environments where you’re guaranteed a bit-for-bit match going from staging to production in Render. You have to build for each environment, which if your builds are deterministic should be fine, but I’ve definitely seen that go haywire where you find out your build is in fact not deterministic in some subtle way.