Resolve failed Docker deployments with credentials

[rtucker-mozilla]

Describe the bug
Often we hit pull limits in docker which result in failed CodeBuild deployments.
toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit

To Reproduce
Steps to reproduce the behavior:
Execute a codebuild task utilizing Docker.

Expected behavior
No Failure

I've spoken with @sciurus about this and he'd mentioned logging into an account. I'd like to figure out where those credentials are as well as what changes to make to the CodeDeploy build

Also reported in https://mozilla-hub.atlassian.net/browse/IAM-819

[rtucker-mozilla]

https://medium.com/rockedscience/fixing-docker-hub-rate-limiting-errors-in-ci-cd-pipelines-ea3c80017acb

^^ this appears to be the solution. Thanks @gcoxmoz

[rtucker-mozilla]

@smarnach This is the situation

[gene1wood]

This was solved in SSO Dashboard ( mozilla-iam/sso-dashboard#447 ) in a parallel effort as I wasn't aware of this work