1) Add longer screws to the plates on the frame of your door.
2) Install a photocell by yourself OR buy a screw in one from Amazon here: http://amzn.to/2pnFGx3
3) Add a 3rd lock or a clean door stop from Home Depot OR buy one from Amazon here: http://amzn.to/2oy6BH4
Most people don't realize that criminals aren't looking for resistance, they are looking for victims.
So the more resistance you can add to their FACE, then you are more than likely not going to end up as a victim.