So I ended up setting it up on AWS with ECS which is similar to docker compose. I have not documented it yet as I got busy (new job), and I want to document a node library I have been building first (https://github.com/vespertilian/dgraph-js-extras). Also not sure if my setup is really a great setup. Dev-ops is not my speciality.
That said, here is a screen capture of my AWS ECS settings which might help you.
One of the issues that stumped me is how to backup and restore when upgrading versions. My solution, which I tried once successfully was to attach an AWS EFS volume to the docker container and backup to that, then restore in another ECS instance from the EFS backup.
I hope that helps you a bit.
I don’t feel like this setup is great, but for now it’s fine for me. I don’t have users so I can always blow away my old DB. I don’t want to spend any more time on managing a DB in 2019. I am hoping they get a hosted service I can just pay for by the time my app is actually ready, this is my side project so I have a lot of other features to work on.
I asked about a hosted version in the roadmap. Maybe add your 2c there.
If you get stuck I will try to answer but it will likely be on the weekend when I have some time.