web.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.webServer>
    <!-- Counter-intuitively this needs to be FALSE so IIS can let go of websockets and node can take over. -->
    <webSocket enabled="false" />
    <handlers>
        <add name="iisnode" path="server.js" verb="*" modules="iisnode"/>
    </handlers>
    <rewrite>
      <rules>
        <rule name="Force redirect to https">
          <match url="(.*)"/>
          <conditions>
            <add input="{HTTP_HOST}" pattern=".+\.azurewebsites\.net$" />
            <add input="{HTTPS}" pattern="Off"/>
            <add input="{REQUEST_METHOD}" pattern="^get$|^head$" />
          </conditions>
          <action type="Redirect" url="https://{HTTP_HOST}/{R:1}"/>
        </rule>
       <!-- First we consider whether the incoming URL matches a physical file in the /public folder -->
        <rule name="StaticContent">
          <action type="Rewrite" url="public{REQUEST_URI}"/>
        </rule>
      <!-- All other URLs are mapped to the node.js site entry point -->
        <rule name="DynamicContent">
          <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="True"/>
          </conditions>
          <action type="Rewrite" url="server.js"/>
        </rule>
      </rules>
    </rewrite>

    <!-- 'bin' directory has no special meaning in node.js and apps can be placed in it -->
    <security>
      <requestFiltering>
        <hiddenSegments>
          <remove segment="bin"/>
        </hiddenSegments>
      </requestFiltering>
    </security>

     <!-- Make sure error responses are left untouched -->
    <httpErrors existingResponse="PassThrough" />
 
    <!--
      You can control how Node is hosted within IIS using the following options:
        * watchedFiles: semi-colon separated list of files that will be watched for changes to restart the server
        * node_env: will be propagated to node as NODE_ENV environment variable
        * debuggingEnabled - controls whether the built-in debugger is enabled
 
      See https://github.com/tjanczuk/iisnode/blob/master/src/samples/configuration/web.config for a full list of options
    -->
    <!--<iisnode watchedFiles="web.config;*.js"/>-->
  </system.webServer>
</configuration>