/// <summary>
/// Adds middleware for using HSTS, which adds the Strict-Transport-Security header.
/// </summary>
/// <param name="app">The <see cref="IApplicationBuilder"/> instance this method extends.</param>
public static IApplicationBuilder UseHsts(this IApplicationBuilder app)
{
HstsOptions options = new HstsOptions();
return(app.UseMiddleware <HstsMiddleware>(options));
}