This was tested and compiled on Ubuntu 20.04

(Those might already be installed, depending on your distro)

sudo apt-get install libx11-dev libxtst-dev libpng-dev

After installing those three libraries you can simply execute npm install.

With npm start, you'll start up the dev server as normal.

Building a production .deb and .appImage package needs to be done via npm run electron:linux.

Notes:

If you run into a robot.js error that it cannot find certain libraries, I'd suggest you install apt-file.

sudo apt-get install apt-file

After that

sudo apt-file update

Error example:

<X11/extensions/XTest.h> 
/urs/bin/ld: cannot find -lpng

-l indicates that library png cannot be found

If such case happens

apt-file search "X11/extensions/XTest.h"

It outputs the libs you need to compile the XTest.h file which in this case would be libpng-dev

Simply install the missing lib and try npm install again.

Repeat until all missing libs are sorted out.