Creates PromotionDto

src/main/java/com/nisum/ascend/promotions/dto/PromotionDto.java

+package com.nisum.ascend.promotions.dto;
+
+import com.nisum.ascend.promotions.model.Promotion;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class PromotionDto {
+    private String promotionId;
+    private String productSku;
+    private float discountPercentage;
+    private int minimumQuantity;
+
+    public static PromotionDto generateDtoFromPromotion(Promotion p) {
+        return new PromotionDto(p.getPromotionId(), p.getProductSku(), p.getDiscountPercentage(),
+                p.getMinimumQuantity());
+    }
+
+    public PromotionDto() {}
+}