6b7ec6cbf2
Adds the ability to set response headers by using a new
`uploads.modifyResponseHeaders` property. You could previously do this
in Express in Payload v2.
You can do this like so:
```ts
upload: {
modifyResponseHeaders: ({ headers }) => {
headers.set('Cache-Control', 'public, max-age=86400')
return headers
}
},
```