If you mean to have the door open automatically, just use 2 collision boxes, one on either side and driving a timeline/timer/etc to open the door Away from itself.
The rotation value will depend on how you have things set up.
It helps if you plan to rotate an object on one axis to have its initial value be 180o so that you can add/subtract from it without dealing with values below 0 (add 360) or over 360 (subtract it).