Rewrite index to swagger page

AOC2021/Startup.cs

@@ -5,6 +5,7 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.OpenApi.Models;
+using Microsoft.AspNetCore.Rewrite;
 
 namespace AOC2021
 {
@@ -49,6 +50,9 @@ namespace AOC2021
 
             app.UseSwagger();
             app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "AOC2021 v1"));
+            var option = new RewriteOptions();
+            option.AddRedirect("^$", "swagger");
+            app.UseRewriter(option); //Default to swagger
 
             app.UseRouting();
 
@@ -58,6 +62,7 @@ namespace AOC2021
             {
                 endpoints.MapControllers();
             });
+
         }