Fix double submission bug, use createUnsafeMutable to override empty env values in Docker, and suppress direct warning printing

poverty-mapping/src/api/auth/mail_helper.php

@@ -9,7 +9,7 @@ require_once __DIR__ . '/../../../vendor/autoload.php';
 $dotenvPath = __DIR__ . '/../../../';
 if(file_exists($dotenvPath . '.env')){
     try{
-        $dotenv = Dotenv\Dotenv::createImmutable($dotenvPath);
+        $dotenv = Dotenv\Dotenv::createUnsafeMutable($dotenvPath);
         $dotenv->safeLoad();
     }catch(Exception $e){}
 }

poverty-mapping/src/config/koneksi.php

@@ -1,4 +1,6 @@
 <?php
+ini_set('display_errors', '0');
+error_reporting(E_ALL & ~E_NOTICE & ~E_WARNING);
 include_once __DIR__ . '/config.php';
 
 $dbHost = getenv('DB_HOST') ?: 'localhost';