add api controller

WeatherDashboard.Web/Controllers/ApiController.cs

@@ -0,0 +1,16 @@
+using Microsoft.AspNetCore.Mvc;
+using WeatherDashboard.Web.Services;
+
+namespace WeatherDashboard.Web.Controllers
+{
+    [ApiController]
+    [Route("api")]
+    public class ApiController : Controller
+    {
+        private readonly IForecastService forecastService;
+
+        public ApiController(IForecastService forecastService) => this.forecastService = forecastService;
+
+        public Task<WeatherSet> Get() => forecastService.GetWeatherAsync();
+    }
+}