When production breaks, the cause is often not where the symptom appears. A slow API might be disk pressure; a 'frontend bug' might be a BGP flap; a 'network issue' might be a full root filesystem.
My incident order: measure impact → preserve data → identify root cause → restore service → validate → document. That sequence works whether it's Nginx, a MikroTik, or a Kubernetes node.
Working across web dev, NOC, sysadmin, and cloud taught me that production systems cannot be understood from only one layer.