feat(deploy-prod): add step to ci.yml to deploy to production

[seaerchin]

Problem

We have no workflow that deploys to production now. We require a new workflow to push to both ecs and eb (so that deployment for be consistent across both)

Solution

Add a new deploy_prod workflow that does the deploy to ecs/ecr

update ci.yml so that it uses a new job to run the above workflow. we do this instead of just invoking hte new workflow directly cos they have the same trigger (push) so it might fail if both ci + deploy_prod ran tgt