magento2 – Magento ERR_EMPTY_RESPONSE – Magento Stack Exchange

I have Magento working in a cPanel, but I need to migrate in to Docker.

I kept the same version of PHP (7.1.33) and also MySQL (5.7).

Installed the extensions:

mysqli, pdo_mysql, mcrypt, intl, xsl, gd, bcmath, soap, zip, sockets, sqlsrv, pdo_sqlsrv.

Run the commands:

rm -rf var/cache/* var/page_cache/* var/generation/*
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento deploy:mode:show
php bin/magento setup:static-content:deploy

However when I try to access the page I get an ERR_EMPTY_RESPONSE and Apache consumes all the resources of the machine. 8GB RAM & 8 threads.

Magento version 2.2.6.
Where dit I go wrong?