try to add using new rvm

config/deploy.rb

@@ -10,6 +10,7 @@ set :repo_url, 'git@github.com:Librcn/Libr.git'
 set :user,            'deployer'
 set :puma_threads,    [4, 16]
 set :puma_workers,    0
+set :rvm_ruby_string, :local
 
 # Don't change these unless you know what you're doing
 # set :pty,             true
@@ -84,6 +85,9 @@ namespace :deploy do
     end
   end
 
+  before 'deploy', 'rvm:install_rvm'  # install/update RVM
+  before 'deploy', 'rvm:install_ruby' #
+
   after 'deploy:updated', 'sidekiq:stop'
   after 'deploy:reverted', 'sidekiq:stop'
   after 'deploy:published', 'sidekiq:start'