@peterjriley2024 Door opens outward here, most real front doors open inward as that keeps the lock bolt out of reach of things like saw blades.

Barricading is simple for the usual inward-opening door: lock it, then push a heavy chest of drawers, a loaded tall toolbox that doesn't sit on just the wheels when stopped and upright, or something similar against the door.

Once barricaded, call in your local rapid response network and community members to break the resulting siege.