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

Docker Container Exits Immediately in Docker Compose

If your Docker container exits immediately after starting with docker compose up, it...

Fix 'Python Virtual Environment Activate Command Not Found'

When you try to activate a Python virtual environment with source venv/bin/activate ...

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...

Fix Cloudflare Origin Certificate with Let's Encrypt

If your origin server is rejecting the Cloudflare origin certificate—perhaps because of a SAN mis...

Fix 'Permission Denied' When Using pip in VS Code Terminal

When you try to install a Python package with pip install in the VS Code terminal an...

Fix Docker Volume Permission Denied for Postgres