* add docker build optimized for size; do not copy models to image
useful for cloud deployments. attempts to utilize docker layer
caching as effectively as possible. also some quick tools to help with
building
* add workflow to build cloud img in ci
* push cloud image in addition to building
* (ci) also tag docker images with git SHA
* (docker) rework Makefile for easy cache population and local use
* support the new conda-less install; further optimize docker build
* (ci) clean up the build-cloud-img action
* improve the Makefile for local use
* move execution of invoke script from entrypoint to cmd, allows overriding the cmd if needed (e.g. in Runpod
* remove unnecessary copyright statements
* (docs) add a section on running InvokeAI in the cloud using Docker
* (docker) add patchmatch to the cloud image; improve build caching; simplify Makefile
* (docker) fix pip requirements path to use binary_installer directory
