Add PWA APIs content

* Update 100-apis.md

* Update content/roadmaps/100-frontend/content/117-progressive-web-apps/100-apis.md

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

content/roadmaps/100-frontend/content/117-progressive-web-apps/100-apis.md

@@ -1 +1,8 @@
-# Apis
+# PWA APIs
+
+One of the main purposes of PWAs is to provide a native-app-like experience. APIs like service workers, web sockets, and storage allow a PWA to fast load, access data offline, and other capabilities, similar to a native app.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://web.dev/progressive-web-apps/'>Progressive Web Apps</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps'>Progressive web apps (PWAs)</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://blog.logrocket.com/project-fugu-5-new-apis-to-try-out-in-your-pwa/'> 5 new APIs to try out in your PWA</BadgeLink>