se elimina boton de volver a paso 1 en paso 3

app/Resources/views/producto_final/landing_producto.html.twig

@@ -31,7 +31,7 @@
     <div class="app-container">
         <img class="img-responsive logo-app" src="{{asset('manuel/images/atrevete-desafio.png')}}" alt="Atrévete al desafío" />
         <div id="foto_actual" class="marco-foto"
-             style="background: url('') no-repeat center center; background-size:cover;">
+             style="background: url('{{asset('manuel/images/selfie-p.jpg')}}') no-repeat center center; background-size:cover;">
             <button id="startbutton"></button>
             {#CODIGO OCULTO#}
             {{ include('producto_final/camera_logic.html.twig') }}