Raspberry Pi 3+ IC880A

hi i have download and install resin os.
i have configured environment variables
Gateway ID B827EBFFFE2B652D
this ID is generated while am using jessielite.
all other things as per in Getting started.
what is the Device configuration button in the dashboard, because in Getting started guide nothing about that.
i have a problem in clone the project,
i try to install git hub in my system terminal, but it failed to fetch.
help me to complete the following step
$ git clone https://github.com/resin-io-projects/simple-server-node.git

Hi @manisubbu07

It looks like your http proxy server (at is not available.

any other options to install git in ubuntu

Could you check if you have internet connection on the machine?