For the most part updating the controller is as simple as:

1. SSH into your docker server, pi, vm, etc….
2. cd to the folder with your docker-compose.yml in.
3. Run docker compose pull to download the lastest images.
4. Run docker compose down and docker compose up -d to restart the controller.

Specific version changes

Controller 1.2.0

Controller 1.2.0 requires TTS 2.0.0 or later. TTS 2.0.0 is a breaking change that needs your docker-compose.yml to be edited.

1. Change TTS_API=http://tts-api:8080/piper to TTS_API=http://tts-api
2. Change image: openschoolbell/tts:1 to image: openschoolbell/tts:2

And then run the normal update process.