cloudron-setup: add container virtualization check

scripts/cloudron-setup

@@ -46,6 +46,12 @@ if [[ "$(uname -m)" != "x86_64" ]]; then
     exit 1
 fi
 
+cvirt=$(systemd-detect-virt  --container)
+if [[ "${cvirt}" != "none" ]]; then
+    echo "Error: Cloudron does not support ${cvirt}, only runs on bare metal or with full hardware virtualization"
+    exit 1
+fi
+
 # do not use is-active in case box service is down and user attempts to re-install
 if systemctl cat box.service >/dev/null 2>&1; then
     echo "Error: Cloudron is already installed. To reinstall, start afresh"