Update 'installer.sh'

installer.sh

@@ -42,6 +42,16 @@ timedatectl set-timezone Europe/Amsterdam
 mkdir -p /etc/nginx
 mkdir -p /var/www/"$domain"/html
 chmod -R 755 /var/www
+if free | awk '/^Swap:/ {exit !$2}'; then
+    echo "swap enabled"
+else
+    fallocate -l 3G /swapfile
+    chmod 600 /swapfile
+    mkswap /swapfile
+    swapon /swapfile
+    echo '/swapfile swap swap defaults 0 0' >> /etc/fstab
+fi
+sed -i 's/#/vm.swappiness=40/g' /etc/sysctl.conf
 
 ##-------------##
 #    Debloat    #