weichen
35d114307d
Why: deploying a new build meant manually finding and killing the old
process, rebuilding and re-launching with the right flags; dev and prod
instances could collide on ports, data dirs or kill each other.
Evidence: live matrix on the worktree - dev deploy (stop -> make build
-> start with health check), redeploy swaps the pid and keeps seeded
data, prod deploys alongside dev on separate port/data with fully
isolated /api/projects, port takeover is refused with the owning
process named while the running env stays up, stop clears pidfile and
frees the port. A pid-capture bug (compound-background subshell wrote
the wrapper pid instead of the server) was caught and fixed during the
first live run.
Impact: scripts/svc.sh <dev|prod> [deploy|stop|start|restart|status|
logs]; runtime/<env>/{data,svc.pid,svc.log,svc.env} isolation; defaults
dev 127.0.0.1:8788 / prod 127.0.0.1:8787 overridable via SVC_* env
vars (incl. SVC_PROD_DSN for the PG tier); make svc ENV=... shortcut;
runtime/ gitignored. Safety: only processes started by the script are
stopped (pidfile + /proc cmdline double check).
Refs: feature/svc-env-script task card.