Store and send image content-type

[oliverjam]

week4-milly-paolo-orian/routes/imgPath.js

Lines 4 to 6 in ff05340

	model.getImg(req.params.id).then((user) => {
	res.send(user.img);
	});

Right now you just send the raw bytes of the image to the browser. Browsers are smart enough to interpret these as images, but if you look in the network tab you'll see all the image requests on /news-feed are just octet-stream (instead of e.g. png or image/jpeg or something.

It's best practice to let the browser know exactly what you're giving it. There are different optimisations and other behaviours that might happen for different types of image decoding that presumably cannot happen here.

Multer provides you with the mimetype of the uploaded file, so you could store this (and file size/any other info you might need) in the DB along with the raw bytes. Then you'd use this info to set the content-type header (and maybe content-length etc)