Google is a very helpful tool! This was the first result when I searched “Railway Docker Compose” https://docs.railway.com/guides/dockerfiles#docker-compose

Yes

You can import services straight from your Docker Compose file! Just drag and drop your Compose file onto your project canvas, and your services (and any mounted volumes) will be auto-imported as staged changes. It’s like magic, but with YAML instead of wands. 🪄

A quick heads-up: we don’t support every possible Compose config just yet (because Rome wasn’t built in a day). But don’t worry, we’re on it!
Although this isn't a good doc

😄

Is that not what you’re looking for? That looks like a solution to me.

don't think so it works for building docker files mentioned within compose am I correct?

Have you tried it yet? I don’t know the specifics of how the import process works.

yea, seems to be like it doesn't 😄

Do these have any extra cost?

Do what? Replicas? Regions? Resource limits?

Replicas are copies of your existing app. They effectively multiply the spend of your service by the number of replicas you have

you should not use replicas unless you know you need them