Pin golangci-lint to commit c0d3ddc9cf3faa61a4e378e879ece580256d76e5
(v2.12.2) in Dockerfile and script/bootstrap. Fix the goconst findings
the new version reports under the unchanged canonical .golangci.yml by
extracting shared test fixture constants and a statusError constant in
the watcher.
- Replace convoluted CI workflow (setup-go, install golangci-lint, install
goimports, make check) with simple 'docker build .' per repo policy
- Pin Docker base images by SHA256 hash instead of mutable tags
- Pin golangci-lint and goimports by commit hash instead of @latest
- Add binutils-gold for linker compatibility on alpine
- Run on all pushes, not just main/PR branches
Full project structure following upaas conventions: uber/fx DI, go-chi
routing, slog logging, Viper config. State persisted as JSON file with
per-nameserver record tracking for inconsistency detection. Stub
implementations for resolver, portcheck, tlscheck, and watcher.
