fix umurmur deployment and remove ispublic flag

tasks/mumble_web.yml

@@ -1,3 +1,8 @@
+- name: Install NodeJS
+  import_role:
+    name: geerlingguy.nodejs
+  tags: nodejs
+
 - name: Install git package
   package:
     name: git

tasks/umurmur.yml

@@ -83,10 +83,4 @@
   register: umurmur_started
 
 - name: Trigger umurmur handlers
-  meta: flush_handlers
-
-- name: Open umurmur port with UFW
-  ufw:
-    rule: allow
-    port: "{{ umurmur_port | str }}"
-  when: umurmur_ispublic | bool
+  meta: flush_handlers