fix node-red debug window websocket connection

roles/iot/tasks/nodered.yml

 - name: Run Node-Red install script
   shell: /root/nodered/update-nodejs-and-nodered --confirm-root --confirm-install --skip-pi --restart --update-nodes
 
+- name: Enable Apache wstunnel module
+  command: a2enmod proxy_wstunnel creates=/etc/apache2/mods-enabled/proxy_wstunnel.load
+  notify: restart apache
+
 - name: Register new Node-Red service
   systemd: name=nodered daemon_reload=yes enabled=yes
 

roles/iot/templates/etc_apache2_sites-available_grafana.j2

     ServerAlias {{ domain }}
 
     SSLEngine               On
+    SSLProxyEngine          On
     DocumentRoot            "{{ item.doc_root }}"
     DirectoryIndex          index.html
     Options                 -Indexes
     ProxyRequests           Off
     ProxyPreserveHost       On
 
+    ProxyPass               /nodered/comms ws://localhost:1880/comms
+    ProxyPassReverse        /nodered/comms ws://localhost:1880/comms
+
     ProxyPass               /nodered/ http://localhost:1880/
     ProxyPassReverse        /nodered/ http://localhost:1880/