Well, I still haven't gotten the Credentials (or even env variables) working with the standard bitnami (non-root) LAMP images. (apache and php-fpm). Regardless, I have put in way too much time on this project to give up. I am looking at hosting this thing in multiple containers sin Lightsail behind a lightsail load balancer. It seems from the AWS light sail documentation that I won't be able to use my docker-compose. Rather I need to build a single image with Docker Run. This might also solve my env variable (or credentials) problem.
I know nothing about docker run, my app uses docker-compose up. Does Bitnami have any insructions on how to do this or how to deploy on AWS?