istrain-public: from-scratch build of a passive RF train detector

Public community release. The complete working system — DSP + decoders (scripts/),
web dashboard + API (dashboard/), container stack (docker/), config templates (config/) —
plus APOCALYPSE-EDITION.md, the full build guide for a human or a coding agent. GPLv3
(PyEOT dependency). Scrubbed of all secrets, internal IPs, hostnames, and location detail.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docker/web.Dockerfile

@@ -0,0 +1,6 @@
+# istrain web — Mill flavor. Same animal as nas/Dockerfile (the old-NAS image): stdlib-only serve.py,
+# app bind-mounted at /app so dashboard updates are a re-deploy + restart, never a rebuild.
+FROM python:3.12-slim
+WORKDIR /app
+EXPOSE 3456
+CMD ["python3", "dashboard/serve.py"]