MEAN.JS_and_DiOc.sh

# With the basic (500 MB RAM) you will need a swap with 1 GB to run MEAN.js or
# Gitlab, you can do that following the steps above:
sudo swapon -s
sudo dd if=/dev/zero of=/swapfile bs=1024 count=2048k
sudo mkswap /swapfile
sudo swapon /swapfile
sudo echo '/swapfile       none    swap    sw      0       0' > /etc/fstab
# This sets the system to swap memory only when RAM usage is more than 80%,
# default was swapping when RAM usage was more than 60%, which results in 
# most of the services being swapped if you experience a traffic spike.
echo 20 | sudo tee /proc/sys/vm/swappiness
echo vm.swappiness = 20 | sudo tee -a /etc/sysctl.conf
sudo chown root:root /swapfile 
sudo chmod 0600 /swapfile