Vercel

Build me a git-push deploy pipeline for my own VPS to replace Vercel. Requirements: - Target: one VPS running Caddy. Each app lives in /srv/apps/<name>/ with a systemd service and a Caddyfile entry. - A bare git repo per app on the VPS with a post-receive hook: check out to releases/<timestamp>, run npm ci && npm run build, health-check the new process, flip a current symlink, restart the systemd unit. Keep the last 5 releases. - Deploying is git push vps main; the hook streams build output back to my terminal. A failed build or health check leaves the live release untouched. - rollback <app>: re-point the symlink to the previous release and restart, under 10 seconds. - newapp <name> <domain>: scaffolds the bare repo, systemd unit, and Caddy block, then reloads Caddy. HTTPS is automatic via Caddy. - Secrets: each app reads /srv/apps/<name>/shared/.env, symlinked into every release, never committed. - No accounts, no telemetry, no dashboard; logs via journalctl -u <app>. - Out of scope: per-branch preview deployments, edge/CDN, autoscaling, and a web UI. One VPS, main branch only. - README: server prerequisites, DNS records, and an honest note that I am now the platform team, budget time for the first 2am breakage.