Knowledge base for software setup, errors, and daily tool work.

Fixing Nginx 502 Bad Gateway with Docker and Load Balancers

If you're running Nginx as a reverse proxy or load balancer in a Docker setup, a 502 Bad Gate...

Fix PyCharm Virtual Environment Not Activating

When you open a terminal in PyCharm and see the base Python interpreter instead of your virtual e...

Fix Docker Container Exits Immediately in Background Mode

You run a Docker container with -d (detached mode) and it exits immediately. The con...

How to Fix Cloudflare Error 521: Origin Server Unreachable

If you see Cloudflare error 521, your origin server is not responding to Cloudflare's request...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Node.js Memory Limit Increase Not Working: Fixes

You set --max-old-space-size=4096 but Node.js still crashes with a memory error. Thi...