fix #2481

dolphinscheduler-server/src/main/resources/config/install_config.conf

@@ -27,6 +27,9 @@ dbhost="192.168.xx.xx:3306"
 # db username
 username="xx"
 
+# database name
+dbname="dolphinscheduler"
+
 # db passwprd
 # NOTICE: if there are special characters, please use the \ to escape, for example, `[` escape to `\[`
 password="xx"