Server

Runs web and application services on a host: process supervision, ports and sockets, worker sizing, restarting without dropping requests. Use when a service will not start, dies after logout, restart-loops, or vanishes on reboot; when a port is already in use, or it answers on localhost but refuses connections from outside; when a request returns 502, 504, 413, 499, or a redirect loop between proxy and app; when wiring nginx, Caddy, Traefik, HAProxy, systemd, PM2, or php-fpm; when sizing workers and threads, tuning keepalive and timeouts, or a box runs out of file descriptors or memory under l