* Provide basic implementation of AWS S3 storage module

* Abstract S3 Compatible Storage Module logic

* Refactor `getFileExtension()` into the `page` object

* Add implementation for Digitalocean storage module

* Remove accidental `async`/`await` in S3 Storage Module

* Remove argument from the call to `page.getFileExtension()`

https://github.com/Requarks/wiki/pull/1015#discussion_r321990073

Fixing typo on: "server\modules\rendering\html-core\renderer.js"

Lines 40 and 41. Invalid reference to "WIKI.config.site.host" -- should be: "WIKI.config.host"

This was causing rendering issues when attempting to create some sample pages; such as: https://github.com/jbaez001/markdown-cheatsheet

* added custom keycloak authentication.

* update readme.

* updated readme.

* reverted README for PR.

* fix: use async/await

* changed callback parameter name from done to cb.

* fix: keycloak description + website

* fix: keycloak logo

[ci skip]