Fixing missing param

```ruby
[root@puppet ~]# ./curl.sh
ArgumentError: wrong number of arguments (1 for 0)
    /usr/local/bin/webhook:67:in `deploy'
    /usr/local/bin/webhook:59:in `block in <class:Server>'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1603:in `call'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1603:in `block in compile!'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:966:in `[]'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:966:in `block (3 levels) in route!'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:985:in `route_eval'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:966:in `block (2 levels) in route!'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1006:in `block in process_route'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1004:in `catch'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1004:in `process_route'
    /opt/puppet/lib/ruby/gems/1.9.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:964:in `block in rout
```