Add caddy resources

Matching content from https://github.com/kamranahmedse/developer-roadmap/blob/master/content/roadmaps/101-backend/content/122-web-servers/102-caddy.md

content/roadmaps/102-devops/content/104-setting-up-x/106-caddy.md

@@ -1 +1,7 @@
-# Caddy
+# Caddy
+
+The Caddy web server is an extensible, cross-platform, open-source web server written in Go. It has some really nice features like automatic SSL/HTTPs and a really easy configuration file.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Official Website' href='https://caddyserver.com/'>Official Website</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=t4naLFSlBpQ'>Getting started with Caddy the HTTPS Web Server from scratch</BadgeLink>