Fix Nginx Upstream Connection Refused Socket Error
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
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npm install Permission Denied: VS Code Terminal FixFixing Cloudflare Wildcard Subdomain Proxy ErrorsHow to Fix Docker Container Exits Immediately with Permission DeniedFix 'Your Credentials Did Not Work' in Remote DesktopTroubleshooting Python Virtual Environment Activation FailureChecklist for Nginx Configuration Test FailureTroubleshooting Nginx 502 Connection RefusedResolve NET::ERR_CERT_AUTHORITY_INVALID on Managed Devices