What does HackerNews think of minideb?

You might even want to look at the minideb[1] based bitnami images if extension is less important.

for example postgres: https://github.com/bitnami/containers/tree/main/bitnami/post...

- bitnami/postgresql:15 bb50064c650b 275MB ( postgis included! )

- postgres:15-alpine 6a35e2c987a6 243MB

- postgres:15-bullseye 2bb008a38e7c 379MB

[1] https://github.com/bitnami/minideb

However, it is sometimes a good idea to benchmark the speed of different images, as sometimes a significant speed loss is possible. for example: alpine and bitnami images optimized for size.

If reliability and support is important then the official debian based images are the way to go. ( --> postgres:15-bullseye )

There is also https://github.com/bitnami/minideb

You could try https://github.com/bitnami/minideb - about 52Mb uncompressed.