Previous binary releases, used by the CI tests who are confirming version compatibility between sets of nodes.
The main branch should contain any binaries that are currently in production, with a nomenclature that expresses their commit hash - e.g. lit_node_948a5175616c60240f670d15c75ecfceb691d060.
Branches can be constructed using the same name as a feature or release branch in the lit-peer repo, in order to run tests against additional binaries ( ie, to account for environments other than production ).