Fix install (#8724)

Don't try to connect to the database if it isn't configured yet.

app/Providers/AppServiceProvider.php

@@ -20,17 +20,19 @@ class AppServiceProvider extends ServiceProvider
      */
     public function boot()
     {
-        // connect legacy db
+        // connect legacy db, only if configured
         //FIXME this is for auth right now, remove later
         $db_config = config('database.connections')[config('database.default')];
-        dbConnect(
-            $db_config['host'],
-            $db_config['username'],
-            $db_config['password'],
-            $db_config['database'],
-            $db_config['port'],
-            $db_config['unix_socket']
-        );
+        if (!empty($db_config['database'])) {
+            dbConnect(
+                $db_config['host'],
+                $db_config['username'],
+                $db_config['password'],
+                $db_config['database'],
+                $db_config['port'],
+                $db_config['unix_socket']
+            );
+        }
 
         // load config
         Config::load();