Add Gatsbyjs content on Frontend roadmap (#1140)

* Add Bootstrap CSS content

* Add Bulma CSS content

* Add Prettier content

* Add Vite content

* Add GitHub content

* Add GitHub content

* Add GitHub content

* Add GitLab content at backend roadmap

* Add Git content on Backend roadmap

* Add HTTPS content on Backend roadmap

* Add Version Control System description

* Add Jekyll content on Frontend roadmap

* Add VuePress content on Frontend roadmap

* Revert "Add VuePress content on Frontend roadmap"

This reverts commit 05625604c2.

* Add Gatsbyjs content on Frontend roadmap

* Update content/roadmaps/100-frontend/content/120-static-site-generators/101-gatsbyjs.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/100-frontend/content/120-static-site-generators/101-gatsbyjs.md

@@ -1 +1,8 @@
-# Gatsbyjs
+# Gatsby
+
+Gatsby is a React-based open source framework with performance, scalability and security built-in.
+
+<ResourceGroupTitle>Free Resources</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Official Website' href='https://www.gatsbyjs.com/'>Gatsby Website</BadgeLink>
+<BadgeLink colorScheme='blue' badgeText='Docs' href='https://www.gatsbyjs.com/docs'>Gatsby Docs</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://youtube.com/playlist?list=PL4cUxeGkcC9hw1g77I35ZivVLe8k2nvjB'>Gatsby Tutorial</BadgeLink>