Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...

Docker Compose Port Already Allocated: Fixes & Checks
When you run docker-compose up and see an error like Error starting userland p...

Fix 'network not found' Error in Docker on Linux
When you see docker: Error response from daemon: network <name> not found on L...

How to Create a package.json for Your npm Project
If you're starting a Node.js project, you'll need a package.json file. This ...

Fix VS Code Terminal Not Opening on Windows 10
When you press Ctrl+` or click the Terminal panel in VS Code and nothing happens, it's usuall...

Fixing NGINX Upstream Connection Refused SSL Errors
When NGINX logs upstream connection refused for an SSL backend, it usually means the...