epic: first try at adding a backend

Kemkas.Web/Controllers/OidcConfigurationController.cs

@@ -0,0 +1,26 @@
+using Microsoft.AspNetCore.ApiAuthorization.IdentityServer;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Kemkas.Web.Controllers;
+
+public class OidcConfigurationController : Controller
+{
+    private readonly ILogger<OidcConfigurationController> _logger;
+
+    public OidcConfigurationController(
+        IClientRequestParametersProvider clientRequestParametersProvider,
+        ILogger<OidcConfigurationController> logger)
+    {
+        ClientRequestParametersProvider = clientRequestParametersProvider;
+        _logger = logger;
+    }
+
+    public IClientRequestParametersProvider ClientRequestParametersProvider { get; }
+
+    [HttpGet("_configuration/{clientId}")]
+    public IActionResult GetClientRequestParameters([FromRoute] string clientId)
+    {
+        var parameters = ClientRequestParametersProvider.GetClientParameters(HttpContext, clientId);
+        return Ok(parameters);
+    }
+}

Kemkas.Web/Controllers/WeatherForecastController.cs

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+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Kemkas.Web.Controllers;
+
+// [Authorize]
+[ApiController]
+[Route("[controller]")]
+public class WeatherForecastController : ControllerBase
+{
+    private static readonly string[] Summaries = new[]
+    {
+        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
+    };
+
+    private readonly ILogger<WeatherForecastController> _logger;
+
+    public WeatherForecastController(ILogger<WeatherForecastController> logger)
+    {
+        _logger = logger;
+    }
+
+    [HttpGet]
+    public IEnumerable<WeatherForecast> Get()
+    {
+        return Enumerable.Range(1, 5).Select(
+                index => new WeatherForecast
+                {
+                    Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
+                    TemperatureC = Random.Shared.Next(-20, 55),
+                    Summary = Summaries[Random.Shared.Next(Summaries.Length)]
+                })
+            .ToArray();
+    }
+}