Allow to create a package and install a package compiled from GitHub

Also add nginx config for reverse proxying and set up Let's Encrypt
automatically

site-cookbooks/kosmos-parity/recipes/default.rb

@@ -7,17 +7,7 @@
 # All rights reserved - Do Not Redistribute
 #
 
-group "parity" do
-  gid 72748
-end
-
-user "parity" do
-  system true
-  manage_home true
-  comment "parity user"
-  uid 72748
-  gid 72748
-end
+include_recipe 'kosmos-parity::user'
 
 parity_version = node['kosmos-parity']['version']
 parity_package_path = "#{Chef::Config[:file_cache_path]}/parity_#{parity_version}_amd64.deb"