Fix regex delimiters, add logo to initial composer help

bin/acme

@@ -12,9 +12,14 @@ use Psr\Log\LoggerInterface;
 if (!file_exists(__DIR__ . "/../vendor/autoload.php")) {
     echo <<<HELP
 
+      ____ __________ ___  ___
+     / __ `/ ___/ __ `__ \/ _ \
+    / /_/ / /__/ / / / / /  __/
+    \__,_/\___/_/ /_/ /_/\___/
+
     You need to install the composer dependencies.
 
-    composer install
+    composer install --no-dev
 
 
 HELP;

src/functions.php

@@ -50,8 +50,8 @@ function resolveServer($uri) {
 
 function serverToKeyname($server) {
     $keyFile = str_replace("/", ".", $server);
-    $keyFile = preg_replace("[^a-z0-9._-]", "", $keyFile);
-    $keyFile = preg_replace("\\.+", ".", $keyFile);
+    $keyFile = preg_replace("@[^a-z0-9._-]@", "", $keyFile);
+    $keyFile = preg_replace("@\\.+@", ".", $keyFile);
 
     return $keyFile;
 }