Initial incubator resources for container build

[tylerthome]

Completes some items from #627

What changes did you make?

• add Dockerfile definitions for base and app container images to .incubator directory
• add auxiliary files (e.g. nginx config, entrypoint bash script) to .incubator directory

Rationale behind the changes?

• prepare for GitHub Action deployment to incubator ECR and ECS

Testing done for these changes

• deployment to ECR

What did you learn or can share that is new?(optional)

• Dockerized nginx customization for server blocks (without TLS), in contrast to existing EC2 configuration

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

N/A

[paulespinosa]

Looks good! Renaming docker-entrypoint.sh will help avoid confusion. Thank you!

[paulespinosa]

gunicorn is not a dependency anymore and I can't see where it's being installed. You might be able to get away with running the fastapi run app/main.py --port 8000 command instead.