Current text:
In a terminal cd to where you just saved the compose file and then run:

Proposed update:
To run Docker Compose in a terminal, follow these steps:

Open your terminal program (Command Prompt or PowerShell on Windows, Terminal on Mac or Linux)
Navigate to the folder where you saved your compose file using the cd command. For example:
cd C:\Users\YourName\Downloads
or
cd /home/username/downloads

Once you're in the correct folder, run this command: