Package RingCentral Glip as a native Linux Electron app with Nativefier.

package-ringcentral.sh

#! /bin/bash

# This requires nativefier to be installed, so do that first:
# https://github.com/jiahaog/nativefier
# I know this uses javascript, which is evil, but it must be done :(
# You'll also need to download an image, which is used as input
# for this script. Specify a path to a PNG.
# A .desktop entry is included with this script; you may need to 
# modify it depending on where you place the packaged output.

if [[ $# == 0 ]]; then
    echo "Please supply an icon."
    exit 1
fi

nativefier https://app.glip.com \
    --tray \
    --name "RingCentral" \
    --icon "$1" \
    --internal-urls "(app.)?(ringcentral|glip).com"

ringcentral.desktop

[Desktop Entry]
Type=Application
Name=RingCentral
Comment=RingCentral Glip messaging client
GenericName=Internet Messenger
Icon=/usr/local/share/ring-central-linux-x64/resources/app/icon.png
Exec=/usr/local/share/ring-central-linux-x64/ring-central
Terminal=false
Categories=Network;InstantMessaging;
StartupWMClass=ringcentral