MAPG-164 show application's name from env variable

src/Controller/LoginController.php

@@ -373,12 +373,11 @@ class LoginController
     {
         $mail = new Mail();
         $mail->addRecipient($email);
-        $mail->setSubject('Welcome to MapGuesser - Activate your account');
+        $mail->setSubject('Welcome to ' . $_ENV['APP_NAME'] . ' - Activate your account');
         $mail->setBodyFromTemplate('signup', [
             'EMAIL' => $email,
             'ACTIVATE_LINK' => $this->request->getBase() . '/'. \Container::$routeCollection->getRoute('signup.activate')->generateLink(['token' => $token]),
             'CANCEL_LINK' => $this->request->getBase() . '/' . \Container::$routeCollection->getRoute('signup.cancel')->generateLink(['token' => $token]),
-            'BASE_URL' => $this->request->getBase(),
         ]);
         $mail->send();
     }
@@ -387,10 +386,9 @@ class LoginController
     {
         $mail = new Mail();
         $mail->addRecipient($email);
-        $mail->setSubject('Welcome to MapGuesser');
+        $mail->setSubject('Welcome to ' . $_ENV['APP_NAME']);
         $mail->setBodyFromTemplate('signup-noconfirm', [
             'EMAIL' => $email,
-            'BASE_URL' => $this->request->getBase(),
         ]);
         $mail->send();
     }

src/Mailing/Mail.php

@@ -29,6 +29,13 @@ class Mail
     {
         $this->body = file_get_contents(ROOT . '/mail/' . $template . '.html');
 
+        $baseParameters = [
+            'APP_NAME' => $_ENV['APP_NAME'],
+            'BASE_URL' => \Container::$request->getBase(),
+        ];
+
+        $params = array_merge($baseParameters, $params);
+
         foreach ($params as $key => $param) {
             $this->body = str_replace('{{' . $key . '}}', $param, $this->body);
         }