File Uploading Episodes
Most applications these days have some way to upload a photo even if it's only for a profile picture or avatar. Uploading images needs to take into account the upload process, the Javascript for the UI, and the server side processing before storing the image in something like Amazon S3 with a reference to it in your database. You'll also want to handle things like CDNs for serving up images around the world, cropping, resizing, and compressing images, transcoding video, and parsing CSV uploads.
