I use Capistrano for NodeJS deployments.

For starters, here’s how one Cap job looks:

(my example uses Chef to find nodes to deploy to)

require "capistrano/chef"
require "chef/node"

set :user, "DEPLOY_USER_GOES_HERE"
set :chef_environment, ENV['CHEF_ENVIRONMENT'] if ENV['CHEF_ENVIRONMENT']

if fetch(:chef_environment).nil?
  abort "CHEF_ENVIRONMENT environment variable not set. Please set it and try again."
end

set :service_name, ENV['SERVICE_NAME'] if ENV['SERVICE_NAME']

if fetch(:service_name).nil?
  abort "SERVICE_NAME environment variable not set. Please set it and try again."
end

service = fetch(:service_name)
chef_env = fetch(:chef_environment)
stripe_key = fetch(:stripe_keyname)
stripe_account = fetch(:stripe_account)

chef_role :node_service, "roles:node-#{service} AND chef_environment:#{chef_env}", primary: true, attribute: "ipaddress"
set :application, service
set :repo_url, "https://GITHUB_KEY_GOES_HER:@github.com/USER_OR_ORG_GOES_HERE/#{service}.git"

set :gitBranch, ENV['BRANCH'] if ENV['BRANCH']
gitHubBranch = fetch(:gitBranch)
set :branch, gitHubBranch unless gitHubBranch.nil?

if gitHubBranch.nil?
  abort "BRANCH environment variable not set. Please set it and try again."
end

set :deploy_to, "/install_path/cap_#{service}/"
set :scm, :git
set :keep_releases, 5
set :linked_files, %w{.env}
set :default_env, {
  NODE_ENV: 'production'
}

namespace :deploy do

  desc 'Install the packages before running the build'
  task :install_npm_packages do
    on roles(:node_service) do
      execute "cd #{release_path} && npm install"
    end
  end

  desc 'Run the build before deploying'
  task :predeploy_build do
    on roles(:node_service) do
      execute "cd #{release_path} && npm run build:prod || npm run build"
    end
  end

  desc 'run tests'
  task :run_tests do
    on roles(:node_service) do
    execute "cd #{release_path} && npm run test"
    end
  end

  desc 'run lint'
  task :eslint_code do
    on roles(:node_service) do
      execute 'name' do
        command "cd #{release_path} && eslint **/src/**/*.js"
      end
    end
  end
  desc 'Prune packages for production'
  task :prune_production do
    on roles(:node_service) do
      execute "cd #{release_path} && npm prune --production"
    end
  end

  desc 'Restart service'
  task :restart_service do
    on roles(:node_service) do
      execute "sudo service #{service} restart"
    end
  end
end

after "deploy:run_tests", "deploy:prune_production"
after "deploy:install_npm_packages", "deploy:predeploy_build"
after "deploy:predeploy_build", "deploy:run_tests"
before "deploy:symlink:release", "deploy:install_npm_packages"
after "deploy", "deploy:restart_service"

If you need help, let me know.

Thank you!