PHP-FPM container + Nginx container: https://github.com/richarvey/nginx-php-fpm/

Mariadb: https://github.com/bitnami/bitnami-docker-mariadb

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Issues: https://www.scalescale.com/tips/nginx/504-gateway-time-out-using-nginx/

https://serverfault.com/questions/596688/docker-nginx-php-fpm-502-bad-gateway#597057

https://stackoverflow.com/questions/46272835/how-to-set-up-apache2-and-php-fpm-via-unix-socket

https://stackoverflow.com/questions/47056062/how-to-connect-nginx-to-php-fpm-using-unix-socket-in-docker

https://stackoverflow.com/questions/17570658/how-to-find-my-php-fpm-sock#22419567

https://stackoverflow.com/questions/16002268/prevent-nginx-504-gateway-timeout-using-php-set-time-limit#17511476