Can't connect to frappe container in dev mode

Trying to install frappe in developer mode

Downloaded easy install, ran
python3 ./ -d

Got to the screen "Please go through the Development Documentation … to fully complete the setup. "

I assume, I should now try to follow these steps: ?

But when I’m trying to connect vscode to container, I’m getting the following error:

What should I do?

The whole error log:

Bind for failed: port is already allocated

make sure there are no services running on ports mentioned in .devcontainer/docker-compose.yml