docker run command given in the readme is non-functional

[whxvd]

https://github.com/microsoft/vscode-generator-code#run-generator-using-docker instructs to run the following command to scaffold a directory:

docker run -v $(pwd):/usr/src/app vscode-generator-code

However, that does not work. The command needs something like -it, so that yo actually can read user input from the terminal.