Hi!
I am really enjoying Delta Chat and I wanted to contribute building this bot, you can find it here:
It is already containerized, so you can directly use the example docker-compose.
Everything is configured in the yaml file; it can handle webhooks with json payload and use its fields to compose custom messages (for chats and broadcast channels) or subscribe to Postgres events, to notify database variations.
Right now I am using it to send a notification on our Delta Chat group when a user sends a registration application to our Lemmy instance, but I am trying to integrate it with some workflow server to send me a message when a new release for my preferred artists is published on Musicbrainz.