first upload all files

app/Http/Middleware/RedirectToInstallerIfNotInstalled.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Closure;
+
+class RedirectToInstallerIfNotInstalled
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if (! config('app.installed') && ! $request->is('install/*')) {
+            return redirect()->route('install.pre_installation');
+        }
+
+        return $next($request);
+    }
+}