Infrastructure
connection refused / ECONNREFUSED 127.0.0.1: a 30-second diagnostic runbook
A 4-step runbook that triages connection refused and ECONNREFUSED 127.0.0.1 in 30 seconds. Diagnose a downed server, port mismatch, firewall, or bind address (127.0.0.1 vs 0.0.0.0) with copy-paste commands, including curl, Node, Go, and psq