Slow Cooker Pork Tacos

whole dried ancho chiles

whole dried pasilla chiles

garlic (, unpeeled)

chipotle peppers in adobo sauce ((from a can))

large yellow onion (, quartered)

olive oil (, divided)

honey

cider vinegar

dried oregano

Salt and freshly ground black pepper

low-sodium chicken broth (3 1/2 cups)

lbs boneless pork shoulder roast ((aka Boston butt roast))

bay leaves

cinnamon stick

Warmed corn tortillas (, thinly sliced red cabbage, thinly sliced red onions, crumbled queso fresco or shredded monterey jack cheese, diced avocados, lemon wedges, cilantro leaves, sour cream)