I have one README.md file that has the following structure:

# Gettings started
Blabla

## Install
Blabla

## Hello world
Blabla

This works fine with docsify and I get a nice sidemenu:

Getting started
 - Install
 - Hello world

But i cannot find an option to collapse this menu.
And I don't want to separate my sections into multiple files, I rather have an one-page.

Any solutions?