On the outside, the CUMAC building looks like a nondescript warehouse on a side street in downtown Paterson. But walk inside, and you’ll find not only a large storage room filled with canned goods but a marketplace where shelves are filled with bread, eggs, milk, produce, and bags of flour. All of it is to feed the needy. The 28,000-square-foot facility is home to the largest food pantry in Passaic County, serving more than 1,200 families, or 2,000 people, a month. On Friday, a trio of state lawmakers — including state Assembly Speaker Craig Coughlin — toured CUMAC as they push a new package o…