Add link to github in rendered docs

Guardfile

 require 'asciidoctor'
 require 'erb'
 
-options = {:mkdirs => true, :safe => :unsafe, :attributes => 'linkcss'}
+options = {:mkdirs => true, :safe => :unsafe, :attributes => ['linkcss', 'allow-uri-read']}
 
 guard 'shell' do
-  watch(/^docs\/[A-Za-z].*\.adoc$/) {|m|
+  watch(/^docs\/[A-Z-a-z][^#]*\.adoc$/) {|m|
     Asciidoctor.load_file('docs/src/main/asciidoc/README.adoc', :to_file => './README.adoc', safe: :safe, parse: false, attributes: 'allow-uri-read')
     Asciidoctor.render_file('docs/src/main/asciidoc/spring-cloud-netflix.adoc', options.merge(:to_dir => 'target/generated-docs'))
   }