I opened my SaaS dashboard and got this:
Web server is down - Error code 521
You → Cloudflare → myapp.example.com
Browser Dallas Host
✅ Working ✅ Working ❌ Error
TL;DR: A routine Docker update silently broke two things on my production server. My reverse proxy couldn't discover...
🛡️ VERIFIED CYBER INTELLIGENCE ID: #3327553