Fixing Nginx 502 Bad Gateway in Docker: Practical Steps
You set up Nginx as a reverse proxy in Docker, but instead of your app you see a 502 Bad Gateway....
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesDocker Build Context Canceled on WSL2: Causes and Fixes
If you're using Docker Desktop with WSL2 backend and your build context gets canceled mid-bui...
How to Create a New Branch from a Detached HEAD in Git
If you see a message like "You are in 'detached HEAD' state" in Git, it means you...
Fix Nginx Configuration Test Failure for Upstream Directive
When you run nginx -t and get an error involving the upstream directive...
Fix Git 'index.lock' Error in VS Code
If you see the error 'fatal: Unable to create 'path/.git/index.lock': File exists'...
Docker Desktop Engine Not Responding: Practical Fixes
You click Start in Docker Desktop, the whale icon spins, but nothing happens — o...
Issue queue
SitemapHow to Run npm install Without sudo Permission Denied
Nginx Upstream Connection Refused: Causes and Fixes
How to Reset Chrome to Fix ERR_NAME_NOT_RESOLVED
How to Fix Cloudflare 521 Error During Setup
Resolve Docker Pull Access Denied in CI/CD
npm package.json Not Found: Troubleshooting Checklist
Fix VS Code Source Control Not Detecting File Modifications
Fix 'python' Command Not Found in Windows PowerShell
Fix Remote Desktop Error 0x204
VS Code Save Permission Denied – Troubleshooting Guide
Windows Update Service Won't Start Automatically? Fix It
How to Identify Extensions Causing ERR_CONNECTION_RESET
Nginx Upstream Connection Refused: Causes and Fixes
How to Reset Chrome to Fix ERR_NAME_NOT_RESOLVED
How to Fix Cloudflare 521 Error During Setup
Resolve Docker Pull Access Denied in CI/CD
npm package.json Not Found: Troubleshooting Checklist
Fix VS Code Source Control Not Detecting File Modifications
Fix 'python' Command Not Found in Windows PowerShell
Fix Remote Desktop Error 0x204
VS Code Save Permission Denied – Troubleshooting Guide
Windows Update Service Won't Start Automatically? Fix It
How to Identify Extensions Causing ERR_CONNECTION_RESET