The runtime image runs as uid 10001, which owns /var/lib/dnswatcher. The
working directory is /, so config loading finds no .env or dnswatcher
config file there; the binary lives in /usr/local/bin. A Docker
HEALTHCHECK probes /.well-known/healthcheck every 10 seconds with busybox
wget, well inside the 60 seconds upaas waits.
Startup now fails with an error naming the data directory when it cannot
be written, instead of running with every save failing. The check creates
the directory if needed and writes and removes the temp file Save uses;
tests cover the create and the write failing.
README gains "Running under upaas": the prod branch, host directory
setup, network and port, environment and health check.
Model: opus-5-5
Updates golangci-lint to v2.12.2 and sets `.golangci.yml` to the org-standard v2-schema config already deployed across the org's repos. The config change is owner-authorized (see #96 (comment) and #96 (comment)); the same file is being landed as canonical via prompts PR #24 (sneak/prompts#24).
## Changes
- **Commit-pinned installs**: golangci-lint pinned to commit `c0d3ddc9cf3faa61a4e378e879ece580256d76e5` (v2.12.2, released 2026-05-06) in `Dockerfile` and `script/bootstrap`.
- **`.golangci.yml` set to the org-standard v2 config** (sha256 `021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb`), byte-identical to the file used across the org's other repos. Settings live under `linters.settings`, so the `lll`/`funlen`/`cyclop`/`dupl` thresholds are actually applied (under the old hybrid file, v2 silently ignored the top-level `linters-settings` block).
- **Lint fixes** required by the now-active thresholds:
- `goconst`: shared constants for repeated status/priority/DNS-fixture strings in `internal/watcher/watcher.go` and the notify, state, and watcher tests
- `dupl`: consolidated duplicated ntfy/slack HTTP-error tests and SendNotification endpoint-error tests behind shared helpers in `internal/notify/delivery_test.go`
- `lll`: wrapped long test table entries and comments in `internal/config/classify_test.go`, `internal/notify/history_test.go`, `internal/state/state_test.go`, `internal/watcher/watcher_test.go`; shortened one inline nolint justification in `internal/notify/retry.go`
- **`TODO.md`**: Completed Steps entry updated in the same commit.
- Rebased onto current `main` (`f79cd98`); the branch is one clean commit.
## Notes
- v2.12 deprecates the `gomodguard` linter in favor of `gomodguard_v2`. The org-standard config does not disable the deprecated linter, so golangci-lint may emit an informational deprecation warning; this is accepted by the owner and does not affect the exit status (this exact config+code combination was CI-green at `dea7e44`).
## Verification
- `make check` exits 0 (fmt-check, tests, lint)
- `make lint`: 0 issues; no deprecation warning surfaced in the runs performed
- sha256 of `.golangci.yml` at HEAD verified equal to `021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb`
Co-authored-by: sneak <sneak@sneak.berlin>
Reviewed-on: #96
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>