fix: database

install_script.sh

@@ -706,8 +706,7 @@ install_trojan_panel() {
       fi
     done
 
-    docker exec trojan-panel-mariadb mysql -h"${mariadb_ip}" -P"${mariadb_port}" -u"${mariadb_user}" -p"${mariadb_pas}" -e "drop database trojan_panel_db;" &>/dev/null &&
-      docker exec trojan-panel-mariadb mysql -h"${mariadb_ip}" -P"${mariadb_port}" -u"${mariadb_user}" -p"${mariadb_pas}" -e "create database trojan_panel_db;" &>/dev/null
+    docker exec trojan-panel-mariadb mysql -h"${mariadb_ip}" -P"${mariadb_port}" -u"${mariadb_user}" -p"${mariadb_pas}" -e "create database if not exists trojan_panel_db;" &>/dev/null
 
     read -r -p "请输入Redis的IP地址(默认:本机Redis): " redis_host
     [[ -z "${redis_host}" ]] && redis_host="127.0.0.1"