install nodejs
install bower
install "n" to use old nodejs
sudo apt install -g n
sudo n 7.4.0
install ionic
sudo apt install -g ionic@3.20.0
sudo apt install -g cordova@8.0.0
install libpng12 for minify
sudo add-apt-repository ppa:linuxuprising/libpng12
sudo apt update
sudo apt install libpng12-0
ionic build
bower install
ionic serve
#minify-conf.json
"alwaysRun": true,
ionic build