Merge pull request 'Updated how i use configs' (#33) from s3service into master

Reviewed-on: #33

LiteCharms.Features/S3/BookstoreS3Service.cs

@@ -5,13 +5,13 @@ namespace LiteCharms.Features.S3;
 public class BookstoreS3Service(IConfiguration configuration, [FromKeyedServices(Constants.BookshopBucketName)] IAmazonS3 amazonS3) : 
     S3ServiceBase(amazonS3), IS3Service
 {
+    private readonly string bucketName = configuration.GetSection($"{Constants.BookshopS3SettingsSection}:BucketName").Value ?? "";
+    private readonly string cdnBaseUrl = configuration.GetSection($"{Constants.BookshopS3SettingsSection}:CdnBaseUrl").Value ?? "";
+
     public override async Task<Result<string>> UploadFileAsync(string fileName, Stream fileStream, string contentType, CancellationToken cancellationToken = default)
     {
         try
         {
-            var bucketName = configuration.GetSection($"{Constants.BookshopS3SettingsSection}:BucketName").Value!;
-            var cdnBaseUrl = configuration.GetSection($"{Constants.BookshopS3SettingsSection}:CdnBaseUrl").Value!;
-
             if(string.IsNullOrWhiteSpace(bucketName)) 
                 return Result.Fail<string>("Bucket name is not configured.");