first upload all files

app/Install/Database.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace FleetCart\Install;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Artisan;
+use Jackiedo\DotenvEditor\Facades\DotenvEditor;
+
+class Database
+{
+    public function setup($data)
+    {
+        $this->checkDatabaseConnection($data);
+        $this->setEnvVariables($data);
+        $this->migrateDatabase();
+    }
+
+    private function checkDatabaseConnection($data)
+    {
+        $this->setupDatabaseConnectionConfig($data);
+
+        DB::connection('mysql')->reconnect();
+        DB::connection('mysql')->getPdo();
+    }
+
+    private function setupDatabaseConnectionConfig($data)
+    {
+        config([
+            'database.default' => 'mysql',
+            'database.connections.mysql.host' => $data['host'],
+            'database.connections.mysql.port' => $data['port'],
+            'database.connections.mysql.database' => $data['database'],
+            'database.connections.mysql.username' => $data['username'],
+            'database.connections.mysql.password' => $data['password'],
+        ]);
+    }
+
+    private function setEnvVariables($data)
+    {
+        $env = DotenvEditor::load();
+
+        $env->setKey('DB_HOST', $data['host']);
+        $env->setKey('DB_PORT', $data['port']);
+        $env->setKey('DB_DATABASE', $data['database']);
+        $env->setKey('DB_USERNAME', $data['username']);
+        $env->setKey('DB_PASSWORD', $data['password']);
+
+        $env->save();
+    }
+
+    private function migrateDatabase()
+    {
+        Artisan::call('migrate', ['--force' => true]);
+    }
+}