feat(server)!: move welcome message to settings (#6157)

* feat(server): move welcome message to settings

* chore: open api

cli/src/api/open-api/api.ts

@@ -4038,6 +4038,12 @@ export interface SystemConfigServerDto {
      * @memberof SystemConfigServerDto
      */
     'externalDomain': string;
+    /**
+     * 
+     * @type {string}
+     * @memberof SystemConfigServerDto
+     */
+    'loginPageMessage': string;
 }
 /**
  *