A bakery grows in a shipping container in a Brooklyn yard. That yard is part of the Bushwick compound of Roberta's Pizza, whose business seems to grow and morph every day. At first, the bakery used the pizza oven during the few, early morning hours it wasn't churning out pies. Last year, the restaurant hired master oven artisan Dick Bessey to build a big wood-fired oven in one of the many shipping containers that clutter its yard. In November, the restaurant brought in Melissa Weller, who has a resume that includes stints as head baker at Per Se and Bouchon as well as work at Sullivan Street and Babbo. The loaves that she pulls out of the oven every morning rival any in the city. More