Node Upload S3 folder

Source: https://www.zeolearn.com/magazine/uploading-files-to-aws-s3-using-nodejs

Bucket is name of your bucket and key is name of subfolder. So, if your bucket name is “test-bucket” and you want to save file in “test-bucket/folder/subfolder/file.csv”, then value of Key should be “folder/subfolder/file.csv”.