nnamso_ needs help uploading an index file to their main domain, http://mytestimony.com.ng/. They have their DNS pointed to Digital Ocean and Discourse installed at http://share.mytestimony.com.ng/. mpalmer replied that the solution involves configuring a web server to serve the index page and updating the DNS records, suggesting that this is a general web server configuration issue rather than a Discourse-specific problem.
You’ll need to configure a webserver to serve up the index page you want, and then point the DNS records for the name to the IP address of that webserver. There is nothing Discourse-specific about that process, though, so you might want to ask in a more appropriate place for help with configuring your webserver of choice.