Adding Custom domains (#247)

* WIP

* wip

* Finished doing most of the work

app/Http/Middleware/CaddyRequestMiddleware.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+
+class CaddyRequestMiddleware
+{
+    /**
+     * Handle an incoming request.
+     */
+    public function handle(Request $request, Closure $next)
+    {
+        if (!config('custom-domains.enabled')) {
+            return response()->json([
+                'success' => false,
+                'message' => 'Custom domains not enabled',
+            ], 401);
+        }
+
+        if (config('custom-domains.enabled') && !in_array($request->ip(), config('custom-domains.authorized_ips'))) {
+            return response()->json([
+                'success' => false,
+                'message' => 'Unauthorized',
+            ], 401);
+        }
+
+        $secret = $request->route('secret');
+        if (config('custom-domains.caddy_secret') && (!$secret || $secret !== config('custom-domains.caddy_secret'))) {
+            return response()->json([
+                'success' => false,
+                'message' => 'Unauthorized',
+            ], 401);
+        }
+
+        return $next($request);
+    }
+}