Customization SNAP installation, it is possible?

Hi Everyone,

I am not secure if is possible to modify the source files from a fresh or existent install of SNAP Rocket.Chat I am trying to modify the main.js to implement a little change with Videocall integration because the Call sound is not possible to change for this purpose and need to change to a Real Call notification, longer. But when I save the File it is in read only filesystem and is not possible to do that.

Can you confirm me that in snapchat is possible to modify directly or only in a instalation with development mode?

I have Ubuntu 18.04LTS
Node v8.11.4
Rocket.Chat 1.3.2
thank you in advance,

best regards