What this snippet does
Scaling works for stateless services that do not publish a fixed host port.
Expected output
myapp-worker-1 Up myapp-worker-2 Up myapp-worker-3 Up
Why practise typing this
Typing compose basics code builds muscle memory for the symbols and indentation Docker uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
More Docker practice
- Single serviceCompose Basics · beginner
- Building from a DockerfileCompose Basics · beginner
- Starting the stackCompose Basics · beginner
- down removes the networkCompose Basics · beginner
- depends_on does not wait for readinessCompose Basics · intermediate
- Waiting on a healthcheckCompose Basics · intermediate