Explain how to customize Postgres container images

[gbartolini]

Explain how to fork the postgres-containers project and how to build custom images with additional layers, including nightly builds through Github actions.

[mymasse]

We would be interested in this also, we're trying to build the Oracle Foreign Data wrapper extension into the image and when we try to launch a cluster with the new image it fails. We can't figure out why

[smiyc]

@sxd wrote an blog post about this topic

https://cloudnative-pg.io/blog/creating-container-images/