Seafood Chowder Soup

2 tbsp butter

2 cups chopped onion

1 celery stalk, chopped

1/4 cup all-purpose flour

4 cups chicken broth

1 lb potatoes, peeled and diced

1 can cream-style corn

1/2 lb bay scallops

1/2 lb small-medium size shrimp

1 lb whitefish, cut into 1/2 inch cubes

2 cans clams, undrained

1 cup half & half

1/2 tsp  Old Bay seasoning

1/2 tsp coarse salt, more to taste

1/4 tsp white pepper

1/2 cup cooked bacon, crumbled or diced, cooked pancetta (for topping; optional)