Create best practices for running Deno docker containers

[igorzi]

• [ ] Use base deno and deno-lambda images from https://hub.docker.com/repositories/denoland
• [ ] deno cache dependencies during docker build
• [ ] Ensure that deno runs with --cached-only to enforce dependencies from docker build
• [ ] Narrow down permissions, don't use --allow-all
• [ ] Handle SIGTERM
• [ ] TODO: How to handle BYOM