Add some resources to Spring node (#1541)

Co-authored-by: sk8higher <sk8higher@iballwasrawt.ru>

content/roadmaps/109-java/content/103-java-web-frameworks/100-sprint.md

@@ -1 +1,9 @@
-# Sprint
+# 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>