Added referrer-policy header

app/Http/Middleware/ReferrerPolicyHeader.php

@@ -0,0 +1,21 @@
+<?php
+namespace App\Http\Middleware;
+
+use Closure;
+
+class ReferrerPolicyHeader
+{
+    /**
+     * Handle the given request and get the response.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return \Illuminate\Http\Response
+     */
+    public function handle($request, Closure $next)
+    {
+        $response = $next($request);
+        $response->headers->set('Referrer-Policy', config('app.referrer_policy'));
+        return $response;
+    }
+}