fix

src/XboxPromotionCheckerBot.App/Infrastructure/Extensions/WebApplicationBuilderExtensions.cs

@@ -16,6 +16,12 @@ namespace XboxPromotionCheckerBot.App.Infrastructure.Extensions;
 
 public static class WebApplicationBuilderExtensions
 {
+    private static DiscordWebhookClient CreateDiscordWebhookClient(string webhookurl)
+    {
+        ArgumentException.ThrowIfNullOrEmpty(webhookurl);
+        return new DiscordWebhookClient(webhookurl);
+    }
+
     public static async Task<IServiceCollection> AddInfrastructure(this IServiceCollection services, IConfiguration configuration)
     {
         var client = MongoDbSetup.MongoClient(configuration.GetConnectionString("Games"));
@@ -28,7 +34,8 @@ public static async Task<IServiceCollection> AddInfrastructure(this IServiceColl
         services.AddSingleton<DiscordWebhookClient>(sp =>
         {
             var cfg = sp.GetRequiredService<IConfiguration>();
-            return new DiscordWebhookClient(cfg.GetConnectionString("DiscordWebhookUrl"));
+            var url = cfg.GetConnectionString("DiscordWebhookUrl");
+            return CreateDiscordWebhookClient(url);
         });
 
         services.AddScoped<IGamesFilter, GameNameFilter>(sp =>

src/XboxPromotionCheckerBot.App/Infrastructure/MongoDb/MongoDbSetup.cs

@@ -11,7 +11,11 @@ public static class MongoDbSetup
 
     public static IMongoDatabase GamesDb(this IMongoClient client) => client.GetDatabase("GamesNew");
 
-    public static IMongoClient MongoClient(string connection) => new MongoClient(connection);
+    public static IMongoClient MongoClient(string connection)
+    {
+        ArgumentException.ThrowIfNullOrEmpty(connection);
+        return new MongoClient(connection);
+    }
     public static async Task Setup(this IMongoDatabase db)
     {
         BsonClassMap.RegisterClassMap<MongoXboxGame>(classMap =>

src/XboxPromotionCheckerBot.App/Program.cs

@@ -8,9 +8,10 @@
 
 var builder = CoconaApp.CreateBuilder();
 
-builder.Configuration.AddEnvironmentVariables();
 builder.Configuration.AddJsonFile("appsettings.json", optional: false);
 builder.Configuration.AddUserSecrets<Program>();
+builder.Configuration.AddEnvironmentVariables();
+builder.Configuration.AddCommandLine(args);
 
 builder.Services.AddCore(builder.Configuration);
 await builder.Services.AddInfrastructure(builder.Configuration);