Where are the hass.io add-on configuration settings stored?

1

For example, in my MQTT Config section I have the following:

{
  "logins": [
    {
      "username": "some username",
      "password": "some password"
    }
  ],
  "anonymous": false,
  "customize": {
    "active": false,
    "folder": "mosquitto"
  },
  "certfile": "fullchain.pem",
  "keyfile": "privkey.pem"
}

Since MQTT is running in a container, I assume it’s being stored in there somewhere. My ultimate goal is to have hass.io running in a docker container that I can fire up with a dockerfile. But in order to get my add-on components working, I will need to somehow to specify my config files so I don’t have to do this manually.