I attempted to follow the documentation to install HASS on to Centos 7.5 minimal. I found gcc gcc-c++ were required for hass to complete the auto install of various python packages and systemd-devel for zwave. Figure this information/step should be included in the installation wiki for centos.
* Updated SCL command to Python 3.6 instead of 3.5
Instructions are for installing Python 3.6 but the scl command given assumes you have Python 3.5
* Updated autostart systemd template to use Python 3.6
