add ssh proxy for production deployment

config/deploy/production.rb

@@ -1,13 +1,13 @@
 set :branch, 'master'
-set :server, 'biodivportal.gfbio.org'
+set :server, '192.168.0.22'
 
 server fetch(:server), user: fetch(:user), roles: %w{web app}
 
 set :ssh_options, {
   user: 'ontoportal',
   forward_agent: 'true',
   #keys: %w(config/deploy_id_rsa),
-  #auth_methods: %w(publickey),
+  auth_methods: %w(publickey),
   # use ssh proxy if UI servers are on a private network
-  #proxy: Net::SSH::Proxy::Command.new('ssh [email protected] -W %h:%p')
+  proxy: Net::SSH::Proxy::Command.new('ssh [email protected] -W %h:%p')
 }