Al Pastor Fish Tacos

Name: Al Pastor Fish Tacos
Ingredients: 2 guajillo chiles; 1 ancho chile; 1 chile de árbol; 1/2 cup achiote liquid (such as El Yucateco); 1/2 cup fresh orange juice; 1/4 cup distilled white vinegar; 2 garlic cloves; 1 teaspoon kosher salt; 1/2 teaspoon black pepper; 1 1/2 pounds white fish fillets (such as red snapper); 5 ounces fresh pineapple, thinly sliced; 2 tablespoons olive oil; 10 (6-inch) corn tortillas, warmed; 1/2 cup torn fresh cilantro; 1/4 cup chopped white onion; 1 avocado, sliced; Lime wedges, for serving