HOWTO: Create a simple, private online photo slideshow

TL;DR I can recommend PhotoSwipe to anyone who needs to create an online photo slideshow on their own web host.
I was recently asked to create an online photo slideshow. Despite being web savvy, I had never done anything like this so I asked my colleagues for suggestions. As a result I used PhotoSwipe, and found it was incredibly easy to get working. All I needed was a web host and access to upload the files which made up the slideshow application.
The steps required were:

1. Download PhotoSwipe;
2. Extract the contents of the PhotoSwipe zip file;
3. Upload PhotoSwipe to a folder on the web host;
4. Edit the index.html with the names of the images and configuration options;
5. Upload the images.

Other hosted options such as Dropbox's native slideshow option would have achieved a similar result but in my case I needed to keep the slideshow private.