* Update the index URLs in bugbug
* Split the http service Docker image in two
This way we can both:
- Build the first half (code + dependencies) in the usual CI.
- Build the second half at the end of the data pipeline with updated models.
Taskboot build-compose doesn't support building all services except a
specific one and it might be cumbersome to add this feature so move the second
half of the Docker image to a separate docker-compose file.