Check the OS and architecture in PowerShell:

    wmic os get caption
    wmic os get osarchitecture

2 Ways to check which version of Node is running on Azure:

1. Open the Kudu Console (via Advanced Tools, CMD) and run: node -v or npm -v

2. In the Azure Portal, in the App Service blade, in Application Settings look for:

   WEBSITE_NODE_DEFAULT_VERSION
   
   

3 Ways to specify the Node.js version to run in Azure:

1. In package.json set the following:

       "engines":{
           "node": "0.6.22 || 0.8.x"
       }
   

2. Set the 'node_env' by changing the value mentioned above in Application settings.

3. Set 'node_env' in your web.config in the system.webServer block:

       <system.webServer>
           ...
           <iisnode node_env="production" />
           ...
       </system.webServer>
   

4. Set it via the iisnode.yml file | Link
   
   Note: The web.config or iisnode.yml values will override the value in Application Settings

5. Deploying Node.js to Azure:
   Link
   Further reading:
   Link
   Link

6. The first article above introduced me to Swaggerize, which, via a Yo generator, lets you generate boilerplate code for your API via a Swagger.json document specifying your routes. It will then also setup the Swagger UI for you to enable testing. Very cool! Link

7. As a reminder, when working with GitHub or Azure via a proxy, remember to:

       git config --global http.proxy http://proxyuser:proxypassword@proxy.server.domain:port
       git config --global --unset http.proxy
       git config --global --get http.proxy