Enable CORS in ASP.NET Core Web Api

CorsStartup.cs

public class Startup
    {
 
        readonly string MyAllowSpecificOrigins = "randomPolicyNameUsedForTestingPurposes"; //the name doesn't matter
        
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(options =>
            {
                options.AddPolicy(name: MyAllowSpecificOrigins,
                    builder =>
                    {
                        builder.WithOrigins("*"); // allow all, I just want to enable CORS without bothering to specify all the allowed origins
                    });
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            // here we use our policy to enable CORS
            app.UseCors(MyAllowSpecificOrigins);
            
            // routing code, bla bla
        }
    }