Add tailscale integration

[MelleD]

This PR makes it possible to start the lambda function as a container and connect to the home assistant via Tailscale VPN. This means that it is not necessary to put your HA on the Internet.

Open points are the adaptation of the wiki and documentation. In addition, you have to clone the repo so that the Docker container can be pushed into its own ECR container in AWS.

In addition, you have to think about how to design the githubaction

If you use PY lamdba directly you now have to adapt the config.py and/or if possible also use ENV variables, then the user no longer has to adapt py at all.

I'm looking forward to feedback.