Installing the app.

Start by building the package

sudo apt-get update && sudo apt-get upgrade -y
sudo apt-get install devscripts python-virtualenv git equivs python-dev dh-make git-buildpackage dh-virtualenv -y
dpkg-buildpackage

Then install the generated .deb file.

dpkg -i ../simple-app_1.0_amd64.deb 

Enjoy !