Added domain provided check to ubuntu install script

ssddanbrown · ssddanbrown · commit 074e0dbb3a4e · 2021-09-25T20:59:00.000+01:00
Related to #30
diff --git a/scripts/installation-ubuntu-20.04.sh b/scripts/installation-ubuntu-20.04.sh
@@ -12,6 +12,14 @@ printf "Enter the domain you want to host BookStack and press [ENTER]\nExamples:
 read -r DOMAIN
 fi
 
+# Ensure a domain was provided otherwise display
+# an error message and stop the script
+if [ -z "$DOMAIN" ]
+then
+  >&2 echo 'ERROR: A domain must be provided to run this script'
+  exit 1
+fi
+
 # Get the current machine IP address
 CURRENT_IP=$(ip addr | grep 'state UP' -A2 | tail -n1 | awk '{print $2}' | cut -f1  -d'/')
 
