Add TailwindCSS setup

ABOUT.md

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 # About This Branch: Simplest Journal Starter
 
-This branch, simplest_journal_starter, is the most most simple of all sub-projects in this repository and may be a good starting place for customization that differ from those seen in all other branches. 
+This branch, simple_journal_starter, is the second most simple of all sub-projects in this repository. It differs from the simplest_journal_starter in that is has additional features listed in these section on [Incrementally Added Features](#incrementally-added-features)
 
-This sub-project is based on [Brad Traversy's Next Markdown Blog](https://github.com/bradtraversy/next-markdown-blog) and its accompanying [video tutorial](https://www.youtube.com/watch?v=MrjeefD8sac&list=PLYZPgijbvzkZjFnjis7CYKyJgBt8ZSZ7X&index=3&ab_channel=TraversyMedia).
+This sub-project is based on [Brad Traversy's DevSpace Blog](https://github.com/bradtraversy/devspace-blog), which is part of his [Next.js Udemy course](https://www.udemy.com/course/nextjs-dev-to-deployment).
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+## Incrementally Added Features
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+This branch is an expanded version of simplest_journal_starter. The features expected to be implemented in this branch which are not present in simplest_journal_starter are the following:
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+* Pagination of the posts on the index page
+* Grouping of posts by category
+* A simple search function of site contents (posts)
+* Caching of posts
+* Tailwind CSS