Git commit hash and service build time information

[drasko]

We from Mainflux have been following the latest "Health Check Response Format for HTTP APIs" draft in order to standardize our healthchecks: https://github.com/mainflux/mainflux/pull/1541.

However, we have a few inquires regarding the available fields to hold useful information about service source code and build.

Through our practice, we have found Git commit hash and additional time of the build to be very useful when included in service info - they compliment version information. We do not, however, find adequate fields in the /health response JSON structure where we can put this information. The closest existing field we have found to Git commit hash is releaseId, but the example shows other usage of this field. For build time we did not find anything useful. So currently we added 2 fields in our response, commit and build_time, but they make our response JSON not adhering to the current standard.

What is the best was to proceed? Should this information be added to some of the existing fields somehow, or should the standard be extended?