Use subtests to isolate asserts in tests; add python 3.12 and 3.13 to tox.ini

Update Dockerfile and docker instructions

Move duplicated queue existence check code to decorator; blacken

Minor code cleanup

Add pyproject.toml and unit tests

Update type annotations to use Python 3.9 native builtin types

Update docker command examples in README.md to include listing running containers and images

Update REST design doc with HTTP status info; added comment in README that the original intent of a single queue was actually implemented as multiple queues

Add docs and README.md

Update/cleanup; added Queue class in server for better "instancing"; restructured files for Dockerfile

Initial commit