Added Enum for priority

ScrumTaskboard/Startup.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.Json.Serialization;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
@@ -32,6 +33,11 @@ namespace ScrumTaskboard
                        .AllowAnyMethod()
                        .AllowAnyHeader();
             }));
+            services.AddMvc().AddJsonOptions(o =>
+            {
+                o.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter());
+                o.JsonSerializerOptions.IgnoreNullValues = true;
+            });
             services.AddScoped(serviceProvider => new TaskContext(
                 new DbContextOptionsBuilder<TaskContext>()
                 .UseNpgsql("Host=nig.gl; Port=8543; Username=scrum; Database=taskboard; Password=c6gXud7YvBWp2sgxSgy4wRN")