Spells out the two-channel CI trigger (dev branch for test builds, v*
tags for releases) as an actual step-by-step process: keeping dev in
sync with main/master, bumping package.json, tagging, and the
required Gitea repo secrets/variables.
Every push to master was triggering a build+push, since that's where
day-to-day commits land. Switch to two deliberate channels instead:
pushing to dev produces a rolling :dev tag for testing, and pushing a
v* tag produces :latest + the version tag for real releases. Plain
commits/merges to master/main no longer build anything on their own.