Request: Customizing via Logical Theme System

[melnibon]

Motivation

I would like to add custom PHP functions as described here: https://github.com/BookStackApp/BookStack/blob/development/dev/docs/logical-theme-system.md

Problem

My Home Assistant is installed on a Raspberry Pi, and It looks like I have no possibility to create the themes/my_theme folder and put my PHP files inside. The ssh & terminal add-on do not show anything related to the Bookstack add-on.

Solution

How to log "inside" the Bookstack add-on with ssh, or how to access to its file system?

All my apologies if I am wrong/missing something. Many thanks to everyone for this wonderful add-on.