Adds JavaScript roadmap (#1537)

* Add JavaScript roadmap project file

* Make way for JavaScript roadmap

* Add JavaScript roadmap on homepage

* Add JavaScript roadmap image

* Add content skeleton for javascript roadmap

* Fix flicker issue on javascript roadmap

* Fix broken build

content/roadmaps/110-java/content/103-java-web-frameworks/100-sprint.md

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+# Spring
+
+Spring is a powerful open-source Java platform (framework), that is used to create and maintain web applications.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Official Site' href='https://spring.io/'>Official Site</BadgeLink>
+<BadgeLink colorScheme='blue' badgeText='Official Site' href='https://spring.io/quickstart'>Quickstart guide</BadgeLink>
+<BadgeLink colorScheme='blue' badgeText='Official Site' href='https://spring.io/guides'>Official guides</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.baeldung.com/spring-boot'>Different Spring tutorials</BadgeLink>

content/roadmaps/110-java/content/103-java-web-frameworks/101-sprint-boot.md

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+# Sprint boot

content/roadmaps/110-java/content/103-java-web-frameworks/102-play-framework.md

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+# Play framework

content/roadmaps/110-java/content/103-java-web-frameworks/103-spark.md

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+# Spark

content/roadmaps/110-java/content/103-java-web-frameworks/readme.md

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+# Java web frameworks