Proximity motion notifications

I have a Stick up came wired in my front doorway. I don't want motion notifications all the time as the street is busy with cars and people walking. I want it to still record these motions and archive them in my timeline but I'd really like to be able to set push notifications only for when motion is detected at a certain distance from my door - that way I'm only notified when it's likely someone or something is within, say 6ft, of my front door.