Version Stamping with ldflags

Refunds fail on one server and work on another. Both servers run a binary named orders, and the deployment records for them are incomplete. An engineer logs in to find out which version each server runs, but the program has no way to report it. The options that remain appear to be comparing the two files and searching old build logs.

The bug itself turns out to be small. Finding out which source code each server was running takes far longer, because the program prints no version and no one on the team knows where else to look.