sudo yum -y install ImageMagic

sudo yum -y install libpng-devel libjpeg-devel libtiff-devel

yum install ImageMagick-devel

Needed to enable swap

https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024 /sbin/mkswap /var/swap.1 /sbin/swapon /var/swap.1