AMP Optimizer: provide a Docker Image

It'd be good to provide a docker image for AMP Optimizer that makes it easy to integrate AMP Optimizer into an AWS / GCloud based hosting environment.

Open question: should we also include basic image optimization capabilities (resize, minification)?

//cc @patrickkettner

Begin by locating the AMP Optimizer entry point and reviewing how it is currently packaged or run; the issue names no files or tests. Clarify whether the image targets AWS/GCloud and whether image resizing or minification is in scope, then define validation for building and running the Docker image.

Written by the indexing model from the issue text.