Is there a specific reason for the version choice?
We wanted to keep a consistent chrome version across the official images and npm package. That time the 79 wasn't available for alpine yet if I remember it right.
Also, the 79 version was sometimes 20% faster than the newer chrome versions.
Nevertheless, the jsreport v3 uses chrome 93 now.
If you want to try to use the same chrome version as it's in the jsreport 2.11, you could inherit from the official alpine jsreport image
FROM jsreport/jsreport:2.11.0