Farmers market shoppers in the know arrive at the Sunday morning Freshfarm Market in Annapolis before 10:30am, when Bob Miller of Nice Farms Creamery sells out of his famous chocolate milk.     Miller is one of 12 farmers and producers who sell at the market near City Dock. Nine hail from Maryland, two from Virginia and one from West Virginia. The market requires producers be part of the Chesapeake Bay watershed. They offer fruits, vegetables, fresh flowers, meats, cheese,...