Add npm mirror URL

Allow to set a custom npm local mirror (e.g sinopia).

playbooks/roles/common/defaults/main.yml

@@ -18,6 +18,7 @@ COMMON_CFG_DIR: "{{ COMMON_BASE_DIR }}/etc"
 COMMON_ENVIRONMENT: 'default_env'
 COMMON_DEPLOYMENT: 'default_deployment'
 COMMON_PYPI_MIRROR_URL: 'https://pypi.python.org/simple'
+COMMON_NPM_MIRROR_URL: 'http://registry.npmjs.org'
 # do not include http/https
 COMMON_GIT_MIRROR: 'github.com'
 # override this var to set a different hostname

playbooks/roles/edxapp/tasks/deploy.yml

@@ -108,7 +108,7 @@
 # Set the npm registry
 - name: Set the npm registry
   shell:
-    npm config set registry 'http://registry.npmjs.org'
+    npm config set registry '{{ COMMON_NPM_MIRROR_URL }}'
     creates="{{ edxapp_app_dir }}/.npmrc"
   sudo_user: "{{ edxapp_user }}"
   environment: "{{ edxapp_environment }}"