Indexer install for Raspbery PI dist does not have docker image with postgress included?

I am creating a node on a Raspbery Pi 4 and have gotten stuck installing the indexer. The Github repository for the Indexer says " We prepared a docker compose file to bring up indexer and postgres preloaded with some data." but the tarfile I downloaded from github does not seem to have the docker file mentioned once extracted. Is this a mistake?

If we have to create the data base from scratch how then do we setup the postgres database for the indexer?

You just need to create a user/password and a database in PostgreSQL.
See for example.

Then the first time you run the indexer, it will automatically create the required tables.

See for details.