MB-9638: Add ecs deploy + codebuild config + nix updates

[ahobson]

Description

Provide a way to deploy to ECS

Reviewer Notes

Is there anything you would like reviewers to give additional scrutiny?

Setup

Add any steps or code to run in this section to help others prepare to run your code:

echo "Code goes here"

Code Review Verification Steps

• Request review from a member of a different team.
• Have the Jira acceptance criteria been met for this change?

References

• Jira story for this change.
• This article explains more about the approach used.

[ronaktruss]

Is there a reason that the original line was replaced with this? When using docker to run tests locally with this change we get an error saying can't open file '/app/local_locust.py'. We may need add something like

COPY local_locust.py /app/local_locust.py

Both the old and new code work when running locust in AWS

[ahobson]

Is there a reason we need to run the load test inside docker locally? It has caused some complication/problems in the past

[ronaktruss]

Moving forward there shouldn't be as we would likely want all of the tests run in AWS. I mentioned the above because up until this PR local testing was the main method of testing. The setup docs provide instructions to support local testing through docker so thought we were going to keep supporting it.

If its caused some issues in the past and we aren't planning on using it moving forward I don't think this is something we need to address. We will likely want to update the docs to reflect this.

[ahobson]

Ah! Yeah, running in docker locally caused problems in the past, and so I think we'd like to not do that anymore. Perhaps that can be a follow up PR to cleanup/remove the documentation to make that clearer?

[ronaktruss]

Outside of the above comment, everything else looks good to me!