Add check to see that we're installed, and remove the .env that's created

app/Http/Middleware/InstalledCheck.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * Handle the authentication for the API layer
+ */
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class InstalledCheck
+{
+    /**
+     * Check the app.key to see whether we're installed or not
+     * 
+     */
+    public function handle($request, Closure $next)
+    {
+        if (config('app.key') === 'NOT_INSTALLED') {
+            return view('system.errors.not_installed');
+        }
+
+        return $next($request);
+    }
+}