Change the way nodejs installed

roles/nodejs/defaults/main.yml

@@ -1,3 +1,2 @@
 ---
-
-NODE_SOURCE_DEB: "https://deb.nodesource.com/node_8.x"
+node_version: 8

roles/nodejs/tasks/ubuntu.yml

@@ -2,15 +2,16 @@
 - name: Ensure apt-transport-https is installed.
   apt: name=apt-transport-https state=present
 
-- name: add nodejs repository key
+- name: Install the gpg key for nodejs LTS
+  become: yes
   apt_key:
-    keyserver: keyserver.ubuntu.com
-    id: "{{ node_key_id }}"
+    url: "https://deb.nodesource.com/gpgkey/nodesource.gpg.key"
     state: present
 
-- name: Add nodejs repository
+- name: Install the nodejs LTS repos
+  become: yes
   apt_repository:
-    repo: 'deb {{ node_source_deb }} {{ansible_distribution_release}} main'
+    repo: "deb https://deb.nodesource.com/node_{{ node_version }}.x {{ ansible_distribution_release }} main"
     state: present
 
 - name: Install nodejs packages