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

How to Validate Nginx Configuration Before Reload

Reloading nginx with a broken configuration can take your site down. The safe way is to test the ...

Node.js Memory Leak Detection: Tools and Practical Fixes

Node.js applications can develop memory leaks over time—heap usage grows steadily, response times...

How to Fix "docker context canceled" on Mac

If you're seeing "context canceled" errors when running Docker commands on your Mac, ...

Fix Docker Volume Permission Denied for Postgres

Fix Docker Compose Environment Variable Default Value Not Used

You define a default value for an environment variable in your docker-compose.yml file, but when ...

Fixing Nginx 502 Bad Gateway in Docker Networks

You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...