Update deployment workflow

[fyliu]

Overview

Update the deployment workflow(s) to use the new AWS Docker configuration with gunicorn and Whitenoise instead of the development setup.

Action Items

• Update deploy-dev.yml (or create a new workflow) to:
  • Build using Dockerfile-aws (if not already using it)
  • Use requirements-aws.txt
  • Call entrypoint-aws.sh correctly
  • Ensure environment variables are set for production/AWS
• Verify that the workflow builds and deploys successfully
• Test that the deployed app serves static files correctly with Whitenoise
• Update any documentation that references the deployment process

Acceptance Criteria

• Deployment workflow builds the Docker image successfully
• Workflow uses the correct Dockerfile and requirements
• App deploys and starts with gunicorn
• Static files are served correctly in the deployed environment
• No breaking changes to the dev environment

Parent Issue: #219
Blocked by: #219 sub-issue "Add gunicorn and Whitenoise, and set up Dockerfile-aws and entrypoint-aws.sh" (or the multi-stage optimization if you wait for that)