web.config

<?xml version="1.0" encoding="utf-8"?>
<!-- copied from https://nuxtjs.org/faq/deployment-azure-portal -->
<!--
     This configuration file is required if iisnode is used to run node processes behind
     IIS or IIS Express.  For more information, visit:

     https://github.com/tjanczuk/iisnode/blob/master/src/samples/configuration/web.config
-->

<configuration>
  <system.webServer>
    <!-- Visit https://azure.microsoft.com/en-us/blog/introduction-to-websockets-on-windows-azure-web-sites/ for more information on WebSocket support -->
    <webSocket enabled="false" />
    <handlers>
      <!-- Indicates that the server.js file is a node.js site to be handled by the iisnode module -->
      <add name="iisnode" path="server" verb="*" modules="iisnode" />
    </handlers>
    <rewrite>
      <rules>

        <rule name="HTTPS force" enabled="true" stopProcessing="true">
          <match url="(.*)" />
          <conditions>
            <add input="{HTTPS}" pattern="^OFF$" />
          </conditions>
          <action type="Redirect" url="https://{HTTP_HOST}{REQUEST_URI}" redirectType="Permanent" appendQueryString="false" />
        </rule>   

        <!-- Do not interfere with requests for node-inspector debugging -->
        <rule name="NodeInspector" patternSyntax="ECMAScript" stopProcessing="true">
          <match url="^server\/debug[\/]?" />
        </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"/>
        </rule>
      </rules>
    </rewrite>

    <security>
      <requestFiltering>
        <hiddenSegments>
          <!-- 
            By default IIS will block requests going to the bin directory for security reasons. 
            We need to disable this since that's where Express has put the application entry point. 
          -->      
          <remove segment="bin"/>
          <add segment="node_modules" />
          <add segment="iisnode" />
        </hiddenSegments>
      </requestFiltering>
    </security>

    <!-- Make sure error responses are left untouched -->
    <httpErrors existingResponse="PassThrough" />

    <iisnode  node_env="production"
		  loggingEnabled="true"
		  devErrorsEnabled="true"
		  logDirectory="..\..\nodelogs"
		 />  
		 </system.webServer>
</configuration>