Heroku不会运行node。

Question

我有一个sails js应用程序，我正在尝试在heroku服务器上启动。据我所知，heroku应用默认安装的是ruby而不是node。

我有一个bower.json文件，一个package.json文件和一个Procfile文件。

错误：

Starting process with command `node app.js`
bash: node: command not found

Procfile：

web: node app.js

Package.json：

{
  "name": "app",
  "private": true,
  "version": "0.0.1",
  "dependencies": {
    "node": "*",
    "sails": "~0.10.5",
    "sails-disk": "~0.10.0",
    "request": "^2.51.0",
    "node-fullbox-api": "*",
    "stripe": "*",
    "rc": "~0.5.0",
    "bower": "^1.3.9",
    "grunt": "^0.4.5",
    "grunt-banner": "^0.2.3",
    "grunt-bower": "^0.14.0",
    "grunt-bowercopy": "^1.1.0",
    "grunt-concurrent": "^0.5.0",
    "grunt-config-dir": "^0.3.2",
    "grunt-contrib-clean": "^0.5.0",
    "grunt-contrib-compass": "^0.8.0",
    "grunt-contrib-concat": "^0.4.0",
    "grunt-contrib-connect": "^0.8.0",
    "grunt-contrib-copy": "^0.5.0",
    "grunt-contrib-cssmin": "^0.10.0",
    "grunt-contrib-htmlmin": "^0.3.0",
    "grunt-contrib-imagemin": "^0.7.2",
    "grunt-contrib-jshint": "^0.10.0",
    "grunt-contrib-requirejs": "^0.4.4",
    "grunt-contrib-watch": "^0.6.1",
    "grunt-githooks": "^0.3.1",
    "grunt-jscs": "^0.6.2",
    "grunt-lodash": "^0.4.0",
    "grunt-modernizr": "^0.5.2",
    "grunt-newer": "^0.7.0",
    "grunt-scss-lint": "^0.3.3",
    "grunt-string-replace": "^1.0.0",
    "grunt-stripmq": "0.0.6",
    "grunt-svgmin": "^0.4.0",
    "jquery-builder": "^0.7.0",
    "jshint-stylish": "^0.4.0",
    "lodash": "^1.3.1",
    "lodash-cli": "^3.1.0",
    "rjs-build-analysis": "0.0.3",
    "time-grunt": "^0.3.2",
    "grunt-contrib-coffee": "~0.10.1",
    "grunt-contrib-jst": "~0.6.0",
    "grunt-contrib-less": "0.11.1",
    "grunt-contrib-uglify": "~0.4.0",
    "grunt-sails-linker": "~0.9.5",
    "grunt-sync": "~0.0.4",
    "include-all": "~0.1.3",
    "underscore": "^1.7.0"
  },
  "scripts": {
    "postinstall": "node npm-postinstall.js"
  },
  "main": "app.js",
  "scripts": {
      "start": "node app.js",
      "debug": "node debug app.js"
  },
  "devDependencies": {
    "mkdirp": "^0.5.0",
    "shortid": "^2.1.3",
    "node": "*"
  },
  "engines": {
      "node": "*",
      "npm":  "*",
      "ruby": "*"
  }
}

至于测试:我可以运行heroku local，如果启动服务器就可以了。npm start和npm install运行得很好。node app.js可以很好地启动应用程序。

我发现当我通过：heroku run bash连接到heroku时

我得到了一个命令行，我可以运行以下命令：

~ $ which ruby
/app/bin/ruby
~ $ npm install
bash: npm: command not found
~ $ bower install
bash: bower: command not found
~ $ which git
/usr/bin/git

我做错了什么？！谢谢!

Answer 1

好了，我找到答案了。每次我推送新代码时，它都会说：

remote: -----> Warning: Multiple default buildpacks reported the ability to handle this app. The first buildpack in the list below will be used.
remote:        Detected buildpacks: Ruby, Node.js
remote:        See https://devcenter.heroku.com/articles/buildpacks#buildpack-detect-order

再加上它所说的node command not found，我能够追踪到heroku有一个默认的顺序，它会检测安装的服务器类型。在这种情况下，它是红宝石。

我在这里找到了答案：Heroku wrongly detecting my Node app as a Ruby app

也就是要这样做：

$ heroku config:add BUILDPACK_URL=https://github.com/heroku/heroku-buildpack-nodejs
$ git commit -am "empty" --allow-empty
$ git push heroku master