Check if arguments are present for setup.sh

setup.sh

@@ -1,6 +1,10 @@
 #!/bin/bash
 set -e
 
+if [[ -z $1 -o -z $2 ]]; then
+    echo "Missing some arguments!"
+    echo "Usage: ./setup.sh <template> <fqdn>"
+fi
 
 apt-get -y install lvm2 mdadm cryptsetup debootstrap btrfs-progs