This is the old AppCenter Dashboard for elementary OS 5.1 and older. You may be looking for the new Flatpak-based AppCenter Dashboard or the new AppCenter Reviews repo.
Houston is currently undergoing a rewrite to typescript with an emphasis on testability. Currently, the only part used in production for v2 is the worker process. Everything else will be found in the master branch.
Houston is part of AppCenter, a multi component system for helping developers and making users' life easier. Houston includes processes for building, testing, and publishing packages, as well as the front end website.
For more information about the architecture and processes that make up Houston please see the architecture file.
For development information see the various readme
files in the
src/
directory.
For building and setting up your own instance read the install file.