I have a large Shepard mix, sometimes bark at cat but have never chased them.

I recently encountered a stray cat near my flat, sometimes I feed it, but afraid to adopt because not sure how my dog will react to it.

The cat will sometimes follow me, even got into the lift sometimes, but I pushed it out.

Weeks later, it's still around, feels bad to see it living in the open, want to call SPCA but not sure how they will treat it.

My question is, if I adopt it (legally), should I be worried about my dog hurting the cat? What can I do to make my dog get used to the cat?