scaenae: move env vars to yarn task

roles/scaenae/tasks/main.yml

@@ -1,10 +1,4 @@
 ---
-# This is required to ensure that the node executable is found
-# when running yarn
-environment:
-      NVM_DIR: /home/nicolo/.nvm
-      PATH: /home/nicolo/.nvm/versions/node/v22.21.1/bin:{{ ansible_env.PATH }}
-
 - name: Ensure ACL is installed
   ansible.builtin.package:
     name:
@@ -38,3 +32,8 @@ environment:
   become: true
   # To be changed!!
   become_user: nicolo
+  # This is required to ensure that the node executable is found
+  # when running yarn
+  environment:
+    NVM_DIR: /home/nicolo/.nvm
+    PATH: /home/nicolo/.nvm/versions/node/v22.21.1/bin:{{ ansible_env.PATH }}