Where to find the directory to make toolbar compact?

Hello folks,
I was going through the Api Documents and was wondering How can i make the toolbar compact?
I found the the way in here config
where to find the config file or i have to put the config somewhere?

OS version: Ubuntu 20.04LTS
App version: DocumentServer 7.0.1
Downloaded from: GITHUB

Please specify what platform (DMS) you are integrating your Document Server with.
The editor config is not a file, it is an object that must be contained in the html page to initialize the editor.
More info here:

Got it, since i was using document-server-integration was unable to understand the use of the config customisation.
Thanks a lot.