Your dog is a fine choice for home protection. She’ll hear stuff way before you can, from upstairs or down.
Automatic lights are good, so is a gun - choose carefully, you should get plenty of gun choosing advice in this forum.
We keep a hard-wired phone next to the bed, in case of need when power is out. And a good flashlight. Surefire makes a small, super bright one with long shelf life.
FYI, you should also have a cell phone. It’s stupidly easy to cut a home’s telephone lines. It’s not so easy to knock a cell tower off the air.
Landlines are only superior in power emergencies.