txt

app/views/server/websites/index.txt.erb

+[
+<% @websites.each do |website| %>
+  "<%= website.repository_url %>",
+<% end %>
+]
\ No newline at end of file

config/initializers/mime_types.rb

 # Be sure to restart your server when you modify this file.
 Mime::Type.register "application/xls", :xlsx
+Mime::Type.register "text/plain", :txt
 Mime::Type.register "application/xml", :xml, %w( text/xml application/x-xml )