fix: v2.1.0

install_script.sh

@@ -998,7 +998,7 @@ EOF
   fi
 
   https_flag=$([[ -z ${https_enable} || ${https_enable} == 1 ]] && echo "https" || echo "http")
-  domain_or_ip=$([[ -n ${domain} && "${domian}" == "custom_cert" ]] && echo "ip" || echo "${domain}")
+  domain_or_ip=$([[ -z ${domain} || "${domian}" == "custom_cert" ]] && echo "ip" || echo "${domain}")
 
   echo_content red "\n=============================================================="
   echo_content skyBlue "Trojan Panel 安装成功"