Workflow manuals for setup steps, repeatable tasks, and software operations.

Fix Nginx Upstream Connection Refused in Docker

You have Nginx running, either on the host or in a container, proxying to another Docker containe...

Fix Nginx Configuration Test Failure for Upstream Directive

When you run nginx -t and get an error involving the upstream directive...

How to Fix Cloudflare 521 Error on Apache Servers

If you see a Cloudflare 521 error, it means Cloudflare’s network cannot reach your origin server....

Fix Nginx Configuration Test Failure After SSL Setup

You've just added SSL certificates to your Nginx server block, but nginx -t retu...

Enable Wildcard Subdomain in Cloudflare: Step-by-Step

If you need all subdomains (like *.example.com) to point to the same server, a wildc...

Docker Compose 'Network Not Found' Error Fix

When running docker compose up, you might see an error like:

network "my...