runs dist.sh inside that local image via a bind mount, andcupload-image.sh pushes the already-built image.
The Dockerfile also warms the Gradle dependency cache in a throwaway build stage, and pre-installs
the pinned CMake version, so `run-image.sh` doesn't re-download the same Maven dependencies on every run.
dist.sh now strips the -pre+meta suffix before writing package.json's version, since Pebble's build
tooling parses it strictly as X.Y.Z integers and was rejecting suffixed versions.
(semver drives Android versionCode/versionName and package.json). The
build-image/ Dockerfile pins the same toolchain for a portable,
containerized Gitea Actions runner (build-image.sh builds and pushes
it) so releases don't depend on any one machine's local setup.
Pushing vX.Y.Z now builds and publishes a Gitea Release automatically.
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