Checklists for software errors, setup, and tool workflows.

Fix Nginx 502 Bad Gateway in Docker Alpine

You have an Nginx container running on Alpine Linux, and it returns a 502 Bad Gateway. This usual...

Fix Permission Denied on chmod in VS Code Terminal

You're running chmod in the VS Code integrated terminal and seeing 'permissi...

Cloudflare DNS Not Propagating for Subdomain: Fixes

You added a subdomain record in Cloudflare DNS, but it still resolves to the old IP or nothing at...

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

Symptom

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

VS Code Git Changes Not Detected After Clone: Fixes

You clone a repository, open it in VS Code, but the Source Control panel shows no changes—even th...

Fix Git Push Rejected Non-Fast-Forward After Pull

You run git pull, then git push, and get: ! [rejected] non-fast-f...