Docker-compose issue - wrong db dependency

Hi all, have a potential bug here (but is also just as likely to be an issue somewhere between the chair and the keyboard). Using latest 5.2.3.

Instantiated a brand new project, Docker + NodeJS. Set the DB as custom, externally hosted. Development enviro spins up just fine on the local enviro. Making zero changes to the vanilla starter app, I create a DigitalOcean cloud provider and then a QA target of the same config. However, when attempting to deploy to this second hosted target, immediately a docker-compose error gets thrown. It seems the yml may be getting setup incorrectly with an externally-hosted custom DB?

That or I’m screwing something up within the first three minutes of a new project start. Help is appreciated!!
issue|690x428