Knowledge base for software setup, errors, and daily tool work.

How to Fix Firefox Secure Connection Failed Certificate Error

You see a full-page error in Firefox: Secure Connection Failed with a message li...

Fix 'git remote origin already exists' Error in GitLab

Fix Nginx Configuration Test Failure After Adding Proxy Pass

You add a proxy_pass directive to an Nginx server block, run nginx -t, ...

Fix Git Detached HEAD State in Visual Studio Code

You open your project in Visual Studio Code, check the Git graph or status bar, and see something...

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 'Port Already Used by Another Container' in Docker Compose

When you run docker compose up and see an error like port is already allocated...