title: Upload files to a specific folder in the bucket with AWS SDK
body: <p>I'm uploading images to AWS S3 with the developer toolkit for node: </p>
  
  <pre><code>const aws = require('aws-sdk');
  
  const s3Bucket = process.env.S3_BUCKET;
      const s3 = new aws.S3({
        signatureVersion: 'v4',
        region: process.env.S3_REGION,
        accessKeyId: process.env.S3_ACCESS_KEY_ID,
        secretAccessKey: process.env.S3_SECRET_ACCESS_KEY,
      });
  
      const s3Params = {
        Bucket: s3Bucket,
        Key: filename,
        Expires: 60,
        ContentType: filetype,
        ACL: 'public-read',
      };
  </code></pre>
  
  <p>This works but how can I make image be uploaded to a specific folder in the bucket? </p>