fix cap files

config/deploy/production.rb

@@ -2,3 +2,5 @@ set :user, "albert"
 set :rails_env, "production"
 server "sonohara.donmai.us", :roles => %w(web app db), :primary => true, :user => "albert"
 server "hijiribe.donmai.us", :roles => %w(web app), :user => "albert"
+
+set :linked_files, fetch(:linked_files, []).push(".env.production")

config/deploy/staging.rb

@@ -1,2 +1,4 @@
 set :rails_env, "staging"
 server "testbooru.donmai.us", :roles => %w(web app db), :primary => true, :user => "danbooru"
+
+set :linked_files, fetch(:linked_files, []).push(".env.staging")