Heroku Review Setup for Ruby on Rails 5

app.json

{
  "name": "rails-web-application-on-heroku",
  "env": {
    "RAILS_ENV": "staging",
    "RACK_ENV": "staging",
    "NODE_ENV": "production",
    "BUNDLE_WITHOUT": "production:development:test",
    "DB_SEED_ON_REDEPLOY": {
      "description": "Reset database on redeploy",
      "value": "true"
    },
    "RAILS_MAX_THREADS": "5",
    "WEB_CONCURRENCY": "2",
    "HEROKU_APP_NAME": {
      "required": true
    },
    "RAILS_LOG_TO_STDOUT": {
      "required": true
    },
    "RAILS_SERVE_STATIC_FILES": {
      "required": true
    }
  },
  "addons": [
    "heroku-postgresql:hobby-dev",
    "memcachier:dev"
  ],
  "buildpacks": [
    {
      "url": "heroku/ruby"
    }
  ]
}

bin-heroku-release

#!/usr/bin/env bash

echo "== Preparing database =="
bin/rails db:migrate

# Reset database for testing purpose on staging
if [ "$DB_SEED_ON_REDEPLOY" = "true" ]; then
  echo "Seeding ..."
  bin/rails db:seed
  echo "Seeding has been done!"
fi

Procfile

release: bin/heroku-release
web: bundle exec puma -C config/puma.rb