Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You define a variable in a .env file or directly in docker-compose.yml, but your container sees n...

If you see connect() failed (111: Connection refused) or connect() failed (13:...

Fix 'package.json Not Found' After Cloning a Repository
Symptom
You clone a repository from GitHub (or another remote), change into the directory...

Fixing 'Command Not Found' in VS Code Terminal
You open the integrated terminal in VS Code, type a command you know is installed, and get ...

How to Fix Nginx Redirect Loop in Server Block
You set up a server block in Nginx, but now the browser keeps redirecting—http to https, or www t...

Fix npm run build Failed with PostCSS Error
You run npm run build and see a PostCSS error. This often happens after updating pac...