Sonar improvements

Author: EduardoPires

src/Samples/AspNetCore.Jwt.Sample/Program.cs

@@ -3,14 +3,14 @@
 
 namespace AspNetCore.Jwt.Sample
 {
-    public class Program
+    public static class Program
     {
         public static void Main(string[] args)
         {
             CreateHostBuilder(args).Build().Run();
         }
 
-        public static IHostBuilder CreateHostBuilder(string[] args) =>
+        private static IHostBuilder CreateHostBuilder(string[] args) =>
             Host.CreateDefaultBuilder(args)
                 .ConfigureWebHostDefaults(webBuilder =>
                 {