first commit

backend/Controllers/ConfigController.cs

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+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
+using backend.Models;
+
+namespace backend.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class ConfigController : ControllerBase
+{
+    private readonly AppConfig _appConfig;
+
+    public ConfigController(IOptions<AppConfig> appConfig)
+    {
+        _appConfig = appConfig.Value;
+    }
+
+    [HttpGet]
+    public IActionResult GetConfig()
+    {
+        return Ok(new
+        {
+            siteTitle = _appConfig.SiteTitle,
+            subtitle = _appConfig.Subtitle,
+            channels = _appConfig.Channels.Select(c => new { name = c.Name, url = c.Url }),
+            shortText = _appConfig.ShortText,
+            quizParticipationPoints = _appConfig.Quiz.ParticipationPoints,
+            quizCorrectAnswerPoints = _appConfig.Quiz.CorrectAnswerPoints
+        });
+    }
+}