Awesome does not provide autostart functionality; not in the sense of freedesktop autostart specification and using *.desktop files. Below are some solutions for you to consider.

These advices can be useful to create a screen locker with slock and xautolock by simply adding xautolock -time 10 -locker slock to ~/.config/awesome/rc.lua

Red Moon is a screen filter app for night time phone use. It helps you
sleep after using your phone, by providing a red and dimming filter
that is easy on the eyes. It has seperate color temperature, intensity
and dim level settings.

This piece of software will protect you against screens blue light, letting you sleep when your brain asks for it.

Comment bricoler un écran de portable en 2eme moniteur