Resolve "Fix Admin Interface"

Closes #928 (closed)

app/Console/Commands/WaitDB.php

+<?php
+
+namespace App\Console\Commands;
+
+use DB;
+use Illuminate\Console\Command;
+
+class WaitDB extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'wait:db';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Waits until default DB connection is available. ';
+
+    /**
+     * Create a new command instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $starttime = microtime(true);
+
+        while (microtime(true) - $starttime < 60) {
+            try {
+                $connection = DB::connection('mysql')->getPdo();
+                $this->line("Connection to database successfull");
+                return 0;
+            } catch (\Exception $e) {
+                $this->error($e->getMessage());
+                sleep(1);
+            }
+        }
+        return 1;
+    }
+}