cloudron-support: check if whois installed

scripts/cloudron-support

@@ -177,6 +177,11 @@ function check_hairpin_nat() {
 }
 
 function check_expired_domain() {
+    if ! command -v whois &> /dev/null; then
+        echo "Domain expiry check skipped because whois is not installed. Run 'apt install whois' to check"
+        exit 0
+    fi
+
     local -r dashboard_domain=$(mysql -NB -uroot -ppassword -e "SELECT value FROM box.settings WHERE name='dashboard_domain'" 2>/dev/null)
     local -r expdate=$(whois ${dashboard_domain} | egrep -i 'Expiration Date:|Expires on|Expiry Date:' | head -1 | awk '{print $NF}')
     local -r expdate_secs=$(date -d"$expdate" +%s)