Juan Luis Rojas León

When using [@aws-sdk/s3-presigned-post](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/modules/_aws_sdk_s3_presigned_post.html#aws-sdks3-presigned-post) with `serverless-s3-local` I get the following response: ```js { url: 'http://localhost:4569/', fields: { bucket: 'bucket-name', 'X-Amz-Algorithm': 'AWS4-HMAC-SHA256', 'X-Amz-Credential': 'S3RVER/20230109/us-east-1/s3/aws4_request', 'X-Amz-Date': '20230109T203600Z', key: 'file-key.csv', Policy: 'eyJleHBpcmF0aW9uIjoiMjAyMy0wMS0wOVQyMTozNjowMFoiLCJjb25kaXRpb25zIjpbeyJidWNrZXQiOiJkb2N1bWVudC1idWNrZXQifSx7IlgtQW16LUFsZ29yaXRobSI6IkFXUzQtSE1BQy1TSEEyNTYifSx7IlgtQW16LUNyZWRlbnRpYWwiOiJTM1JWRVIvMjAyMzAxMDkvdXMtZWFzdC0xL3MzL2F3czRfcmVxdWVzdCJ9LHsiWC1BbXotRGF0ZSI6IjIwMjMwMTA5VDIwMzYwMFoifSx7ImtleSI6InVwbG9hZHMvYmF0Y2gvY2Q4YjZmNjAtMWE4YS00ZjZmLTlkMzEtNzA3ODBlMDQ0MWZjLzAxR05IWEpWWTBQWFIzSDg1UDNWUFYwUVZULzAxR1BDM1lHODI4S0NQQ1RQU1pQQ1RRQ1cwLmNzdiJ9XX0=', 'X-Amz-Signature': '246ea8c125bc98fc7ebff6f6e54f46aaf2ee11acd8dfa157508a299d1a1b390f'...