If you need change the admin password, schema name, main schema or another params you have modify the enviroments vars saved on .bash_profile or .zshrc file depending of the shell that you are using.
Open you config file
# Bash
vim ~/.bash_profile
# ZSH
vim ~/.zshrc
Source the params
soruce ~/.zshrc
Restart the container
docker-compose restart
Check if everything is ok
# docker exec -ti pl-admin echo <env_var> e.g:
docker exec -ti pl-admin echo $DB_ADMIN_PASSWORD
If this no work for you, just rebuild the image and the container
docker-compose up -d --build