Content-type header exposes tempfile path

[mattlenz]

All of the images served through node-imageable have their content-type header set to the internal tempfile path.

Content-Type: /tmp/node-image-magick/312/be6/f4d/61e/dfe/cc8/902/406/279/647/06e/4d3/19f/7/9327807652ec1f48646d397efb30a228e77ec66e-converted.jpeg

Imageable configuration:

app.use(imageable({
  namespace: 'img',
  keepDownloads: true
}, {}))

Has anyone else run into this issue?