Install Node.js on deploy

We use FNM instead of NVM. Reason: the setup seems easier with just
`eval "$(fnm env)"`.

config/deploy.rb

@@ -49,6 +49,7 @@ def main_deploy_server
  Rake::Task["puma:smart_restart"].clear_actions
 
  after :updating, "install_ruby"
+ after "bundler:install", "install_node"
 
  after "deploy:migrate", "add_new_settings"
 
@@ -88,6 +89,16 @@ def main_deploy_server
  end
 end
 
+task :install_node do
+ on roles(:app) do
+ within release_path do
+ with rails_env: fetch(:rails_env) do
+ execute :rake, "node_manager:install:node"
+ end
+ end
+ end
+end
+
 task :refresh_sitemap do
  on roles(:app) do
  within release_path do

lib/tasks/node_manager.rake

@@ -0,0 +1,35 @@
+namespace :node_manager do
+ module NodeManager
+ def self.manager_path
+ "#{File.expand_path("~")}/.fnm"
+ end
+
+ def self.setup_command
+ "export PATH=\"#{manager_path}:$PATH\" && eval \"$(fnm env)\""
+ end
+ end
+
+ namespace :install do
+ desc "Installs or updates a Node Manager"
+ task :manager do
+ path = NodeManager.manager_path
+
+ begin
+ sh NodeManager.setup_command
+ rescue RuntimeError
+ sh "curl -fsSL https://fnm.vercel.app/install | bash -s -- --install-dir \"#{path}\""
+ else
+ sh "curl -fsSL https://fnm.vercel.app/install | bash -s -- --install-dir \"#{path}\" --skip-shell"
+ end
+ end
+
+ task :node do
+ begin
+ sh "#{NodeManager.setup_command} && fnm use --install-if-missing"
+ rescue StandardError
+ Rake::Task["node_manager:install:manager"].invoke
+ sh "#{NodeManager.setup_command} && fnm use --install-if-missing"
+ end
+ end
+ end
+end