Adds a dependency-free liveness endpoint (GET /api/health), a Docker
healthcheck against it, and docker/rolling-deploy.sh which rebuilds
the shared image once and restarts pawfeed-1/2/3 sequentially, gated
on each becoming healthy before moving to the next. Verified
zero-downtime via continuous curl monitoring through a full run
against production.
Next.js standalone is single-process, so one container only used one
CPU core. A load test hit a hard ceiling at ~60-65 req/sec with one
core pegged at 133% while 3 cores sat idle. Now runs as pawfeed-1/2/3
behind an NPM least_conn upstream, verified via load test showing CPU
spread evenly across all three replicas.
Also caps the Prisma pg pool per-replica via DB_POOL_MAX so 3 replicas
stay well under the Supabase pooler's connection limit.
admin