Slow Cooker Caribbean Jerk Pulled Pork Tacos

 pound boneless pork roast

 tablespons brown sugar

 teaspoon paprika

 teaspoon chili powder

 teaspoon garlic powder

 teaspoon onion powder

 teaspoon salt

 teaspoon all spice

 teaspoon ground ginger

 teaspoon cayenne pepper

 teaspoon pepper

 ounces pineapple juice

 cup apple cider vinegar

Flour or corn, tortillas, for serving

diced fresh pineapple

 cup diced red onion

 jalapeno pepper, seeded and diced

 cup fresh chopped cilantro

 tablespoon lime juice