Grats on success so far! Just slowly add foods back into your diet (maybe 100-200 calories a day at a time), but NO JUNK. Keeping it clean will help you keep the weight off. Add some healthy fats like nuts, nut butters, avocado, olives and olive oil - in small amounts of course. Your body can use higher good fat quantities in the absence of carbohydrates. In general, stay with the way you have been eating. It sounds very healthy. If you can keep the dietary change indefinitely, you can keep that body indefinitely. I don't know if you counted calories at all before, but it might be a good time to check where you're at. As a rule of thumb, maintenance calories are about 12-13x bodyweight per day. Keeping a food journal for just a few days will help you to get a grasp on where you're at and what (if anything) you need to change.
Be aware that if you add some carbs back into your diet, you may see some initial weight gain. This does NOT mean it's fat. Carbohydrates in the body hold more water, so what you see at first is just water weight in the muscles and organs and such. Do not panic.