message: Last-Modified header toUTCString
diff: @@ -98,7 +98,7 @@ export const getFile = async (
  // Add the content type to the response (it's not propagated from the S3 SDK)
  res.set('Content-Type', headObject.ContentType)
  res.set('Content-Length', headObject.ContentLength?.toString())
  - res.set('Last-Modified', headObject.LastModified?.toString())
  + res.set('Last-Modified', headObject.LastModified?.toUTCString())
  res.set('Content-Disposition', `inline;`)
  res.set('Cache-Control', 'public, max-age=3w1557600')
  res.set('ETag', headObject.ETag)
  