How to access served content after build in review page

I want to be able to view a web page after a build everytime there is a commit, so i can review the changes without building the changes locally. Everytime the build finishes it is served through a port, how can i render the contents of that port in the phabricator’s review page?or is it not possible?
i’m currently using harbormaster to run the build commands and herald rules to trigger harbormaster everytime there is a revision.

Sorry if it is a stupid question, i’m pretty new to all of this :slight_smile: