add container for cache indices & search API

[elrayle]

Description

For sustainability and sharing of the infrastructure to support searching cached authorities, a Docker image of the search API with support for reading indices from a Docker volume will be created. Templates to aid with deployment will also be created.

• create Dockerfile and docker-compose.yml
  • create an image of the search API (may be as simple as using tomcat image and dropping in war file)
  • create volume to hold indices
• create github actions to deploy new image
  • commits to dev deploy to int private image
  • commits to main deploy to stg private image
  • release deploys to public image
• write templates to automate deploy to AWS