Try to change route

.drone.yml

@@ -28,8 +28,6 @@ steps:
         from_secret : CONTAINER_NAME
       COMMAND: create
       OVERWRITE: true
-      CODEFIRST_CLIENTDRONE_ENV_CONTAINER_NAME:
-        from_secret : FULL_PATH_NAME
       ADMINS: dorianhodin,alexislamande,baptistebaverel,johanlachenal
     depends_on: [ formulaire ]
 

Source/Controller/FrontController.php

@@ -83,7 +83,7 @@ class FrontController
     protected function mapRoutes(): void
     {
         global $controller;
-        $this->router->map('GET', '/', array($controller['Candidate'], 'goToForm'), 'goToForm');
+        $this->router->map('GET', '', array($controller['Candidate'], 'goToForm'), 'goToForm');
         $this->router->map('POST', '/submitForm', array($controller['Candidate'], 'submitForm'), 'submitForm');
         $this->router->map('POST', '/addQuestion', array($controller['Admin'], 'addQuestion'), 'addQuestion');
         $this->router->map('POST', '/addResponse', array($controller['Admin'], 'addResponse'), 'addResponse');