
Docker Compose: Fix 'Port Already in Use on Host' Error
When you run docker compose up and see an error like port is already allocated...
Software troubleshooting desk

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

You start Docker Desktop, but the engine stops almost immediately, often with a message about WSL...

When using Visual Studio Code's Remote – Containers extension or attaching to a running Docke...

You click the Windows Security icon or try to open it from Settings, but nothing happens. The app...

You run npm install or npm start and get something like:
...
You run source venv/bin/activate (or venv\Scripts\activate on Windows) ...