Add HTTP example to README

Author: iffy

README.md

@@ -1,5 +1,9 @@
 This repo contains the **bare minimum code** to have an auto-updating Electron app using [`electron-updater`](https://github.com/electron-userland/electron-builder/tree/master/packages/electron-updater) with releases stored on GitHub.
 
+If you can't use GitHub, you can use other providers:
+
+- [Complete electron-updater HTTP example](https://gist.github.com/iffy/0ff845e8e3f59dbe7eaf2bf24443f104)
+
 **NOTE:** If you want to run through this whole process, you will need to fork this repo on GitHub and replace all instances of `iffy` with your GitHub username before doing the following steps.
 
 1. For macOS, you will need a code-signing certificate.