Add official guide of node.js applications

nodejs/README.md

@@ -1,42 +1,4 @@
-# Nodejs platform
+Node.js platform
+===========
 
-The Nodejs platform uses nvm to run your code and you can choose what node
-version you want to run it. To define node version you have three ways:
-
-    * .nvmrc
-        $ cat .nvmrc
-        4.4.0
-    * .node-version
-        $ cat .node-version
-        4.4.0
-    * package.json
-        $ cat package.json
-        ...
-        "engines": {
-            "node": "4.2.6",
-        },
-        ...
-
-This file should be in the root of deploy files.
-
-    $ ls
-    Procfile     app.js       hook.js      package.json
-
-To install your dependencies, first we check if there is a `yarn.lock` file
-in the root of your files. If so, we use [yarn](https://yarnpkg.com/);
-otherwise, we use [npm](https://www.npmjs.com/package/npm).
-
-You have to list your dependencies in the `package.json` file.
-
-    $ cat package.json
-    ...
-    "dependencies": {
-        "express": "3.x"
-    }
-    ...
-
-If you want to also install development dependencies, set the environment
-variable ``NPM_CONFIG_PRODUCTION=false``. Otherwise, we'll only install
-regular dependencies.
-You can also cache your node_modules by setting environment variable
-``KEEP_NODE_MODULES=true``.
+Official guide: https://tsuru.github.io/docs/user_guides/deploy_nodejs_apps/