Add create_admin.php tool

tools/create_admin.php

@@ -0,0 +1,11 @@
+<?php
+const ADMIN_USER='admin';
+const ADMIN_PASS='YOUR_PASSWORD';
+
+require_once __DIR__ . '/../common_config.php';
+$db = get_db_instance();
+$hash = password_hash( ADMIN_PASS, PASSWORD_ARGON2ID );
+$stmt = $db->prepare( 'INSERT INTO admin (password_hash_type, password, superadmin, username, created, modified) VALUES ("{ARGON2ID}", ?, 1, ?, NOW(), NOW());' );
+$stmt->execute( [ $hash, ADMIN_USER ] );
+$stmt = $db->prepare( 'INSERT IGNORE INTO domain (domain, created, modified) VALUES (?, NOW(), NOW())' );
+$stmt->execute( [ PRIMARY_DOMAIN ] );