Build Herd-MDL from any GitHub branch

[nateiam]

As a Herd-MDL OSS contributor I want to build an MDL stack from Herd-MDL code I forked and modified so I can dev/build/test contributions

NOTE - Only applies to Herd-MDL code (CFTs and scripts) -- does not need to work with customized Metastor and BDSQL code. These are handled in other stories

Acceptance Criteria

• User is able to trigger MDL build and deploy process that uses their customized MDL code
• Takes inputs: target AWS account, GitHub branch, build bucket location
  • Build bucket can be any S3 bucket
• Any pre-requisites are documented
  • see Technical Notes for AMI vs Docker

Technical Notes

• Team should determine if AMI or Docker is a better approach

[sbalkee]

1. Create Docker Image
2. Bundle/Install all dependencies into the docker image
3. Publish Docker Image
4. Parameterize AWS account specific for the build/deploy script
5. Documentation

[nateiam]

split Metastor artifact publishing into a separate issue