Checklists for software errors, setup, and tool workflows.

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...

Fixing Cloudflare 521 Error After Server Restart

You restart your server, wait for it to come back up, then visit your site—only to see a Cloudfla...

Fixing Nginx Permission Denied for Root Directory

You've set up a new Nginx server block, pointed the root directive to a directory, and when y...

Fix Cloudflare Wildcard Subdomain and Root Domain Conflict

If you use a wildcard DNS record (e.g., *.example.com) on Cloudflare, you may run in...

How to Fix Cloudflare 521 Error Due to Proxy Issues

If you see a Cloudflare 521 error, the message usually says something like “Web server is down.” ...

Fix VS Code Git Changes Not Showing in Source Control Panel

You open the Source Control panel in VS Code expecting to see your unstaged and staged changes, b...