Encrypt traffic between ALB and ECS application

[aaroncarlucci]

Explore encrypting traffic between the ALB and the ECS application. This is considered an "optional" requirement, but would demonstrate security emphasis.

Initial plan:

• Create self-signed SSL certificate during Docker build for maximum lifetime (10 years?)
• Modify ECS task port from 80 to 443
• Modify ALB listener port forward from 80 to 443
• Modify ALB health check to port 443

Depends on moving toward a customized Dockerfile.