Add docs dropdown to header

Author: jlin27

ts/components/header.tsx

@@ -7,6 +7,7 @@ import { Link } from 'ts/components/documentation/shared/link';
 import { Button } from 'ts/components/button';
 // import { DropdownProducts } from 'ts/components/dropdowns/dropdown_products';
 // import { DropdownResources } from 'ts/components/dropdowns/dropdown_resources';
+import { DropdownResources } from 'ts/components/dropdowns/dropdown_docs';
 import { Hamburger } from 'ts/components/hamburger';
 import { Logo } from 'ts/components/logo';
 import { MobileNav } from 'ts/components/mobile_nav';
@@ -41,7 +42,8 @@ const navItems: NavItemProps[] = [
     {
         id: 'docs',
         text: 'Developers',
-        url: WebsitePaths.Docs,
+        dropdownComponent: DropdownDocs,
+        dropdownWidth: 270,
     },
     {
         id: 'zrx',