How do I build & install a client from source code and check its checksum matches your released binary for download?

My community is looking for a secure communication solutions. Keybase seems very promising. In particular, it allows signup (identify yourself) with PGP pubs, and its code is open-sourced, great!

Now a last-mile question is: where do I find the documentation to `How do I build & install a client from source code and check its checksum matches your released binary for download?`

No files, tests, or entry points are named. Start by locating the existing source-build, installation, release, and checksum documentation, then verify the documented process against the project’s released binaries. Done means a newcomer can build and install the client and compare its checksum with a downloaded release binary.

Written by the indexing model from the issue text.