Port being undefined in the Azure Node.js application running on IISNode

I have an Azure App Service running Node.js application using IISNode. The problem is that process.env.PORT is undefined. I have read that IISNode uses a thing called named pipes and that the port information might not be easily readable (?), but in my case I only get undefined.

The project I try to deploy can be found from GitHub.

I do have a Web.config file defined and it looks like this:

    <handlers>
        <!-- indicates that the app.js file is a node.js application to be handled by the iisnode module -->
        <add name="iisnode" path="index.js" verb="*" modules="iisnode" />
    </handlers>

    <rewrite>
        <rules>
            <!-- Don't interfere with requests for node-inspector debugging -->
            <rule name="NodeInspector" patternSyntax="ECMAScript" stopProcessing="true">
                <match url="^index.js\/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 application entry point -->
            <rule name="DynamicContent">
                <match url="/*" />
                <action type="Rewrite" url="index.js" />
            </rule>
        </rules>
    </rewrite>

    <!-- You can control how Node is hosted within IIS using the following options -->
                <!--<iisnode      
                  node_env="%node_env%"
                  nodeProcessCountPerApplication="1"
                  maxConcurrentRequestsPerProcess="1024"
                  maxNamedPipeConnectionRetry="3"
                  namedPipeConnectionRetryDelay="2000"      
                  maxNamedPipeConnectionPoolSize="512"
                  maxNamedPipePooledConnectionAge="30000"
                  asyncCompletionThreadCount="0"
                  initialRequestBufferSize="4096"
                  maxRequestBufferSize="65536"
                  watchedFiles="*.js"
                  uncFileChangesPollingInterval="5000"      
                  gracefulShutdownTimeout="60000"
                  loggingEnabled="true"
                  logDirectoryNameSuffix="logs"
                  debuggingEnabled="true"
                  debuggerPortRange="5058-6058"
                  debuggerPathSegment="debug"
                  maxLogFileSizeInKB="128"
                  appendToExistingLog="false"
                  logFileFlushInterval="5000"
                  devErrorsEnabled="true"
                  flushResponse="false"      
                  enableXFF="false"
                  promoteServerVars=""
                 />-->
    <iisnode watchedFiles="*.js;node_modules\*;routes\*.js;views\*.jade;views\account\*.jade;iisnode.yml" />
</system.webServer>

I have written a Kudu scripts that will build the assets and copy them to %DEPLOYMENT_TARGET%.

What is it that I am missing here? Any help is appreciated!

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