Deploy Sockethub from the npm package

This is currently 3.1.4 and is set as an attribute. The recipe is very
simple now, it installs the npm package, and the systemd service runs
/usr/bin/sockethub and sets the environment variables

Closes #145

site-cookbooks/sockethub/templates/default/nginx_conf_sockethub.erb

@@ -8,10 +8,13 @@ map $http_upgrade $connection_upgrade {
   '' close;
 }
 
-<% if File.exist?(@ssl_cert) && File.exist?(@ssl_key) -%>
 server {
+  <% if File.exist?(@ssl_cert) && File.exist?(@ssl_key) -%>
   listen <%= @sockethub_external_port %> ssl http2;
   add_header Strict-Transport-Security "max-age=15768000";
+  <% else -%>
+  listen <%= @sockethub_external_port %>;
+  <% end -%>
 
   server_name <%= @server_name %>;
 
@@ -32,7 +35,8 @@ server {
     proxy_set_header Connection $connection_upgrade;
    }
 
+  <% if File.exist?(@ssl_cert) && File.exist?(@ssl_key) -%>
   ssl_certificate <%= @ssl_cert %>;
   ssl_certificate_key <%= @ssl_key %>;
+  <% end -%>
 }
-<% end -%>

site-cookbooks/sockethub/templates/default/nodejs.systemd.service.erb

@@ -5,7 +5,6 @@ After=redis-server.service
 
 [Service]
 ExecStart=<%= @entry %>
-WorkingDirectory=<%= @app_dir %>
 User=<%= @user %>
 Group=<%= @group %>
 <% unless @environment.empty? -%>