Provide an OpenAI compatible web-server that can be deployed using Docker

[fedirz]

Hey, I've just created parler-tts-server which is an OpenAI compatible web-server that can be deployed using Docker wrapping parler-tts. I'd like to create a pull-request, modifying the "Usage" section with the instructions on how to run the model with Docker using parler-tts-server. Would that be a welcome change?

I would also be open to creating a pull-request adding the parler-tts-server into this repo!