Adding Docker and extending HA config, lovelace

[lolouk44]

• update code to create a docker comtainer, incl stdout logging, and initial Dockerfile based on python:2.7.18-slim-buster (used/tested with a Raspberry Pi3)
• update README with docker-compose, extended HA config and lovelace
• Script to read from docker-compose Env and generate config file
• updated mqtt & bluepy in requirements.txt