Try this too. It's a security bar. You place it under the door knob and the bar is long enough to reach the floor to where it makes it so no one is able to move your door from the other side. Similar to if you jamb a chair under your door knob but MUCH more effective. It's not an alarm but it's a good investment.
as someone else said the door body doesn’t seem like it would protect from anyone breaking in. I have this: South Main Hardware Security Bar https://www.amazon.com/dp/B0742TN5X6/ref=cm_sw_r_cp_api_i_0PZLFbBKJ3QK6?_encoding=UTF8&psc=1
Which makes me feel really safe.