How to use a custom docker image with custom `docker-entrypoint.sh` which deals with multiple databases?

I have a custom `postgres:latest` docker image which customizes the `docker-entrypoint.sh` as the Dockerfile `ENTRYPOINT` to deal with multiple databases for various applications. According to https://cloudnative-pg.io/documentation/1.16/container_images/, ``` No entry point and/or command is required in the image definition, as CloudNativePG overrides it with its instance manager. ``` Does it mean that I can't use my custom docker image with your cluster deployment?