Remove Reveal.js README and update .gitignore

.gitignore

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 log/*.log
 tmp/**
 node_modules/
-.sass-cache
+.sass-cache
+package-lock.json

README.md

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-<p align="center">
-  <a href="https://revealjs.com">
-  <img src="https://hakim-static.s3.amazonaws.com/reveal-js/logo/v1/reveal-black-text-sticker.png" alt="reveal.js" width="500">
-  </a>
-  <br><br>
-  <a href="https://github.com/hakimel/reveal.js/actions"><img src="https://github.com/hakimel/reveal.js/workflows/tests/badge.svg"></a>
-  <a href="https://slides.com/"><img src="https://s3.amazonaws.com/static.slid.es/images/slides-github-banner-320x40.png?1" alt="Slides" width="160" height="20"></a>
-</p>
-
-reveal.js is an open source HTML presentation framework. It enables anyone with a web browser to create beautiful presentations for free. Check out the live demo at [revealjs.com](https://revealjs.com/).
-
-The framework comes with a powerful feature set including [nested slides](https://revealjs.com/vertical-slides/), [Markdown support](https://revealjs.com/markdown/), [Auto-Animate](https://revealjs.com/auto-animate/), [PDF export](https://revealjs.com/pdf-export/), [speaker notes](https://revealjs.com/speaker-view/), [LaTeX typesetting](https://revealjs.com/math/), [syntax highlighted code](https://revealjs.com/code/) and an [extensive API](https://revealjs.com/api/).
-
----
-
-### Sponsors
-Hakim's open source work is supported by <a href="https://github.com/sponsors/hakimel">GitHub sponsors</a>. Special thanks to:
-<div align="center">
-<a href="https://www.doppler.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=revealjs&utm_source=github">
-  <div>
-    <img src="https://user-images.githubusercontent.com/629429/146530588-2980c34d-862f-4393-8ac3-65fbef6443ca.png" width="290" alt="Doppler">
-  </div>
-  <b>All your environment variables, in one place</b>
-  <div>
-    <sub>Stop struggling with scattered API keys, hacking together home-brewed tools,</sub>
-    <br>
-    <sup>and avoiding access controls. Keep your team and servers in sync with Doppler.</sup>
-  </div>
-</a>
-</div>
-
----
-
-### Getting started
-- 🚀 [Install reveal.js](https://revealjs.com/installation)
-- 👀 [View the demo presentation](https://revealjs.com/demo)
-- 📖 [Read the documentation](https://revealjs.com/markup/)
-- 🖌 [Try the visual editor for reveal.js at Slides.com](https://slides.com/)
-- 🎬 [Watch the reveal.js video course (paid)](https://revealjs.com/course)
-
----
-
-### Online Editor
-Want to create your presentation using a visual editor? Try the official reveal.js presentation platform for free at [Slides.com](https://slides.com). It's made by the same people behind reveal.js.
-
-<br>
-<br>
-
---- 
-<div align="center">
-  MIT licensed | Copyright © 2011-2022 Hakim El Hattab, https://hakim.se
-</div>