diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/prerequisites.inc.php b/mailcow/src/mailcow-dockerized/data/web/inc/prerequisites.inc.php
new file mode 100644
index 0000000..220c87c
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/prerequisites.inc.php
@@ -0,0 +1,269 @@
+<?php
+
+// Slave does not serve UI
+/* if (!preg_match('/y|yes/i', getenv('MASTER'))) {
+  header('Location: /SOGo', true, 307);
+  exit;
+}*/
+
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/vars.inc.php';
+$default_autodiscover_config = $autodiscover_config;
+
+if (file_exists($_SERVER['DOCUMENT_ROOT'] . '/inc/vars.local.inc.php')) {
+  include_once $_SERVER['DOCUMENT_ROOT'] . '/inc/vars.local.inc.php';
+}
+unset($https_port);
+$autodiscover_config = array_merge($default_autodiscover_config, $autodiscover_config);
+
+header_remove("X-Powered-By");
+
+// Yubi OTP API
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/lib/Yubico.php';
+
+// WebAuthn
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/WebAuthn.php';
+
+// Autoload composer
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/lib/vendor/autoload.php';
+
+// Load Sieve
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/lib/sieve/SieveParser.php';
+
+// minifierExtended
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/lib/JSminifierExtended.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/lib/CSSminifierExtended.php';
+
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/lib/array_merge_real.php';
+
+// Minify JS
+use MatthiasMullie\Minify;
+$js_minifier = new JSminifierExtended();
+$js_dir = array_diff(scandir('/web/js/build'), array('..', '.'));
+foreach ($js_dir as $js_file) {
+  $js_minifier->add('/web/js/build/' . $js_file);
+}
+
+// Minify CSS
+$css_minifier = new CSSminifierExtended();
+$css_dir = array_diff(scandir('/web/css/build'), array('..', '.'));
+foreach ($css_dir as $css_file) {
+  $css_minifier->add('/web/css/build/' . $css_file);
+}
+
+// U2F API + T/HOTP API
+$u2f = new u2flib_server\U2F('https://' . $_SERVER['HTTP_HOST']);
+$qrprovider = new RobThree\Auth\Providers\Qr\QRServerProvider();
+$tfa = new RobThree\Auth\TwoFactorAuth($OTP_LABEL, 6, 30, 'sha1', $qrprovider);
+
+// FIDO2
+$formats = $GLOBALS['FIDO2_FORMATS'];
+$WebAuthn = new \WebAuthn\WebAuthn('WebAuthn Library', $_SERVER['HTTP_HOST'], $formats);
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/solo.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/apple.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/nitro.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/yubico.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/hypersecu.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/globalSign.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/googleHardware.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/microsoftTpmCollection.pem');
+$WebAuthn->addRootCertificates($_SERVER['DOCUMENT_ROOT'] . '/inc/lib/WebAuthn/rootCertificates/huawei.pem');
+
+// Redis
+$redis = new Redis();
+try {
+  if (!empty(getenv('REDIS_SLAVEOF_IP'))) {
+    $redis->connect(getenv('REDIS_SLAVEOF_IP'), getenv('REDIS_SLAVEOF_PORT'));
+  }
+  else {
+    $redis->connect('redis-mailcow', 6379);
+  }
+}
+catch (Exception $e) {
+?>
+<center style='font-family:sans-serif;'>Connection to Redis failed.<br /><br />The following error was reported:<br/><?=$e->getMessage();?></center>
+<?php
+exit;
+}
+
+// PDO
+// Calculate offset
+// $now = new DateTime();
+// $mins = $now->getOffset() / 60;
+// $sgn = ($mins < 0 ? -1 : 1);
+// $mins = abs($mins);
+// $hrs = floor($mins / 60);
+// $mins -= $hrs * 60;
+// $offset = sprintf('%+d:%02d', $hrs*$sgn, $mins);
+
+$dsn = $database_type . ":unix_socket=" . $database_sock . ";dbname=" . $database_name;
+$opt = [
+  PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+  PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+  PDO::ATTR_EMULATE_PREPARES   => false,
+  //PDO::MYSQL_ATTR_INIT_COMMAND => "SET time_zone = '" . $offset . "', group_concat_max_len = 3423543543;",
+];
+try {
+  $pdo = new PDO($dsn, $database_user, $database_pass, $opt);
+}
+catch (PDOException $e) {
+// Stop when SQL connection fails
+?>
+<center style='font-family:sans-serif;'>Connection to database failed.<br /><br />The following error was reported:<br/>  <?=$e->getMessage();?></center>
+<?php
+exit;
+}
+// Stop when dockerapi is not available
+if (fsockopen("tcp://dockerapi", 443, $errno, $errstr) === false) {
+?>
+<center style='font-family:sans-serif;'>Connection to dockerapi container failed.<br /><br />The following error was reported:<br/><?=$errno;?> - <?=$errstr;?></center>
+<?php
+exit;
+}
+
+// OAuth2
+class mailcowPdo extends OAuth2\Storage\Pdo {
+  public function __construct($connection, $config = array()) {
+    parent::__construct($connection, $config);
+    $this->config['user_table'] = 'mailbox';
+  }
+  public function checkUserCredentials($username, $password) {
+    if (check_login($username, $password) == 'user') {
+      return true;
+    }
+    return false;
+  }
+  public function getUserDetails($username) {
+    return $this->getUser($username);
+  }
+}
+$oauth2_scope_storage = new OAuth2\Storage\Memory(array('default_scope' => 'profile', 'supported_scopes' => array('profile')));
+$oauth2_storage = new mailcowPdo(array('dsn' => $dsn, 'username' => $database_user, 'password' => $database_pass));
+$oauth2_server = new OAuth2\Server($oauth2_storage, array(
+    'refresh_token_lifetime'         => $REFRESH_TOKEN_LIFETIME,
+    'access_lifetime'                => $ACCESS_TOKEN_LIFETIME,
+));
+$oauth2_server->setScopeUtil(new OAuth2\Scope($oauth2_scope_storage));
+$oauth2_server->addGrantType(new OAuth2\GrantType\AuthorizationCode($oauth2_storage));
+$oauth2_server->addGrantType(new OAuth2\GrantType\UserCredentials($oauth2_storage));
+$oauth2_server->addGrantType(new OAuth2\GrantType\RefreshToken($oauth2_storage, array(
+    'always_issue_new_refresh_token' => true
+)));
+
+function exception_handler($e) {
+    if ($e instanceof PDOException) {
+      $_SESSION['return'][] = array(
+        'type' => 'danger',
+        'log' => array(__FUNCTION__),
+        'msg' => array('mysql_error', $e)
+      );
+      return false;
+    }
+    else {
+      $_SESSION['return'][] = array(
+        'type' => 'danger',
+        'log' => array(__FUNCTION__),
+        'msg' => 'An unknown error occured: ' . print_r($e, true)
+      );
+      return false;
+    }
+}
+set_exception_handler('exception_handler');
+
+// TODO: Move function
+function get_remote_ip($anonymize = null) {
+  global $ANONYMIZE_IPS;
+  if ($anonymize === null) {
+    $anonymize = $ANONYMIZE_IPS;
+  }
+  elseif ($anonymize !== true && $anonymize !== false)  {
+    $anonymize = true;
+  }
+  $remote = $_SERVER['REMOTE_ADDR'];
+  if (filter_var($remote, FILTER_VALIDATE_IP) === false) {
+    return '0.0.0.0';
+  }
+  if ($anonymize) {
+    if (strlen(inet_pton($remote)) == 4) {
+      return inet_ntop(inet_pton($remote) & inet_pton("255.255.255.0"));
+    }
+    elseif (strlen(inet_pton($remote)) == 16) {
+      return inet_ntop(inet_pton($remote) & inet_pton('ffff:ffff:ffff:ffff:0000:0000:0000:0000'));
+    }
+  }
+  else {
+    return $remote;
+  }
+}
+
+// Load core functions first
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/sessions.inc.php';
+
+// IMAP lib
+// use Ddeboer\Imap\Server;
+// $imap_server = new Server('dovecot', 143, '/imap/tls/novalidate-cert');
+
+// Set language
+if (!isset($_SESSION['mailcow_locale']) && !isset($_COOKIE['mailcow_locale'])) {
+  if ($DETECT_LANGUAGE && isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
+    $header_lang = strtolower(substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2));
+    if (in_array($header_lang, $AVAILABLE_LANGUAGES)) {
+      $_SESSION['mailcow_locale'] = $header_lang;
+    }
+  }
+  else {
+    $_SESSION['mailcow_locale'] = strtolower(trim($DEFAULT_LANG));
+  }
+}
+if (isset($_COOKIE['mailcow_locale'])) {
+  (preg_match('/^[a-z]{2}$/', $_COOKIE['mailcow_locale'])) ? $_SESSION['mailcow_locale'] = $_COOKIE['mailcow_locale'] : setcookie("mailcow_locale", "", time() - 300);
+}
+if (isset($_GET['lang']) && in_array($_GET['lang'], $AVAILABLE_LANGUAGES)) {
+  $_SESSION['mailcow_locale'] = $_GET['lang'];
+  setcookie("mailcow_locale", $_GET['lang'], time()+30758400); // one year
+}
+
+/*
+ * load language
+ */
+$lang = json_decode(file_get_contents($_SERVER['DOCUMENT_ROOT'] . '/lang/lang.en.json'), true);
+
+$langFile = $_SERVER['DOCUMENT_ROOT'] . '/lang/lang.'.$_SESSION['mailcow_locale'].'.json';
+if(file_exists($langFile)) {
+  $lang = array_merge_real($lang, json_decode(file_get_contents($langFile), true));
+}
+
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.acl.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.app_passwd.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.mailbox.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.customize.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.address_rewriting.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.domain_admin.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.admin.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.quarantine.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.quota_notification.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.policy.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.dkim.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.fwdhost.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.mailq.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.oauth2.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.pushover.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.ratelimit.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.transports.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.rspamd.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.tls_policy_maps.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.fail2ban.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.docker.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/functions.presets.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/init_db.inc.php';
+require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/triggers.inc.php';
+init_db_schema();
+if (isset($_SESSION['mailcow_cc_role'])) {
+  // if ($_SESSION['mailcow_cc_role'] == 'user') {
+    // list($master_user, $master_passwd) = explode(':', file_get_contents('/etc/sogo/sieve.creds'));
+    // $imap_connection = $imap_server->authenticate($_SESSION['mailcow_cc_username'] . '*' . trim($master_user), trim($master_passwd));
+    // $master_user = $master_passwd = null;
+  // }
+  acl('to_session');
+}
+$UI_TEXTS = customize('get', 'ui_texts');