Fix Docker Nginx 502 Bad Gateway with MySQL
You have a Dockerized web app behind Nginx, and you're seeing a 502 Bad Gateway error. The ap...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix ERR_NAME_NOT_RESOLVED Caused by Antivirus Block
If you see ERR_NAME_NOT_RESOLVED in Chrome, it usually means the browser can'...
Fix VS Code Permission Denied Error on Windows 11
If you see "permission denied" when saving files, running terminals, or using extensions ...
Fix 'pip externally managed environment' Error for venv Setup
When creating a Python virtual environment on newer Linux distributions (e.g., Debian 12, Ubuntu ...
Fix Python Permission Denied When Installing Package in Virtual Environment
You activate your Python virtual environment, run pip install somepackage, and get a...
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....
Topic paths
Quick titles
VM Engine Stopped in Docker Desktop – Fix GuideDocker Desktop Engine Stopped on Mac M1: Fixes That WorkGit Merge --allow-unrelated-histories vs Rebase GuideVS Code Terminal Permission Error GuideFixing Git Unrelated Histories Merge ErrorHow to Resolve Git Remote Origin Already ExistsFix Nginx Upstream Connection Refused ErrorHow to Fix Cloudflare 521 Error by Checking Server Logs