GetTimeZonesHttpTrigger.cs

[FunctionName("GetTimeZones")]
public static async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "timezones")]HttpRequest req, ILogger log)
{
    var serviceProvider = Bootstrap.ConfigureServices();

    log.LogInformation("GET TIMEZONES");

    var timeZoneService = ServiceProvider.GetService<ITimeZoneService>();
    var timeZones = await timeZoneService.GetTimeZones().ConfigureAwait(false);

    return new OkObjectResult(timeZones ?? new List<string>());
}