Supplement the documentation

[azarouski]

On CE start we can have error:

Error response from daemon: pull access denied for public.ecr.aws/zebrunner/stf, repository does not exist 
or may require 'docker login': denied: Your authorization token has expired. Reauthenticate and try again.

We need to supplement the documentation about the need to register in aws:

aws ecr-public get-login-password --region us-east-1 | docker login --username ... --password-stdin ...