Add "Image" context to add images for the users

Back/skydiveLogs-api.Model/Image.cs

@@ -0,0 +1,13 @@
+namespace skydiveLogs_api.Model
+{
+    public class Image
+    {
+        public int Id { get; set; }
+
+        public string Comment { get; set; }
+
+        public string Data { get; set; }
+
+        public int UserId { get; set; }
+    }
+}