(Photo: Dessert Goals on Instagram)If you agree with Tina Fey that sheet-caking is the best possible way to address the state of our nation, then you were probably deep into #resistance mode at Dessert Goals this past weekend. The fourth installment of the two-day fest came to Dobbin St., in Greenpoint, and brought with it a unicorn’s-horn cornucopia of colorful sweets and treats. The fest, which is said to have sold out its general-admission tickets within minutes, had promised “Instagrammable desserts,” and ‘grammed they were. Here’s what got everyone’s iPhones sticky.