This is the default index page of your website. This file may be deleted or overwritten without any difficulty. This is produced by the file index.html in the web directory. For questions or problems please contact support. Powered by ISPConfig how to change it to my project ??
You should be able to edit these in /usr/local/ispconfig/server. Copy the /usr/local/ispconfig/server/conf/index to /usr/local/ispconfig/server/conf-custom/index. This way you do not lose the changes when you upgrade.