Add extra security headers on website (#4726)

Used with Cloudfare pages

docs/_data/team.js

@@ -9,10 +9,7 @@ export const projectManagers = [
 	{
 		avatar: 'https://www.github.com/jaapmarcus.png',
 		name: 'Jaap Marcus 🇳🇱',
-		links: [
-			{ icon: 'github', link: 'https://github.com/jaapmarcus' },
-			{ icon: 'twitter', link: 'https://twitter.com/jaapmarcus' },
-		],
+		links: [{ icon: 'github', link: 'https://github.com/jaapmarcus' }],
 	},
 	{
 		avatar: 'https://www.github.com/Lupul.png',

docs/public/_headers

@@ -1,3 +1,11 @@
+/*
+	X-Frame-Options: DENY
+	X-Content-Type-Options: nosniff
+	Referrer-Policy: no-referrer
+	Permissions-Policy: document-domain=()
+	Content-Security-Policy: script-src 'self'; frame-ancestors 'none';
+
 /assets/*
 	cache-control: max-age=31536000
 	cache-control: immutable
+