Add task for aws ec2 instance

tasks/ubuntu.rake

@@ -0,0 +1,9 @@
+#!/usr/bin/env rake
+
+desc 'Invoke itamae command for the first time'
+task :ubuntu do
+  node = `ls -1 nodes/*.json | xargs -I % basename % .json | fzf`
+  node.chomp!
+
+  sh "ITAMAE_PASSWORD=musashi bundle ex itamae ssh -u ubuntu -i ~/.ssh/amazon.pem --host #{node} -j nodes/#{node}.json entrypoint.rb"
+end