Node.js app in Azure subfolder not running

We've tried everything with a colleague of mine, but we couldn't get it working :( We have a Web App in Azure - an MVC one. Inside of it we want to add a blog as a subfolder, but for now we test with a very simple express app.

Basically, we have the main MVC app. I've tried both moving my small test node.js app to site\test and site\wwwroot\test. There is a virtual application /test pointing to site/test. (from the Azure portal Application Settings).

Inside the test folder, web.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <system.webServer>
        <handlers>
            <add name="iisnode" path="index.js" verb="*" modules="iisnode" />
        </handlers>
        <rewrite>
            <rules>
                <rule name="DynamicContent">
                    <action type="Rewrite" url="index.js" />
                </rule>
            </rules>
        </rewrite>
    </system.webServer>
</configuration>

index.js

var express = require('express');
var app = express();

console.log(1);

app.get('/', function (req, res) {
  res.send('Hello World!');
});

app.listen(process.env.PORT || 3000, function () {
  console.log('Test is live');
});

package.json

{
  "name": "test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.14.0"
  }
}

After I try to open http://MySite.azurewebsites.net/test/ and then open the main site from FTP and go to LogFiles/DetailedErrors, there are two errors:

HTTP Error 500.1000 - Internal Server Error
Detailed Error Information:
Module     iisnode
Notification       ExecuteRequestHandler
Handler    iisnode
Error Code     0x8007000d
Requested URL      http://MySite:80/test/index.js
Physical Path      D:\home\site\wwwroot\test\index.js
Logon Method       Anonymous
Logon User     Anonymous

and

HTTP Error 403.14 - Forbidden
Detailed Error Information:
Module     DirectoryListingModule
Notification       ExecuteRequestHandler
Handler    StaticFile
Error Code     0x00000000
Requested URL      http://MySite:80/test/
Physical Path      D:\home\site\wwwroot\test\
Logon Method       Anonymous
Logon User     Anonymous

Finally, here's the main app web.config. I suspect it might hold the key to the problem:

<?xml version="1.0" encoding="utf-8"?>
<configuration>  
  <configSections>    
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <sectionGroup name="jsEngineSwitcher">
      <section name="core" type="JavaScriptEngineSwitcher.Core.Configuration.CoreConfiguration, JavaScriptEngineSwitcher.Core" />
      <section name="msie" type="JavaScriptEngineSwitcher.Msie.Configuration.MsieConfiguration, JavaScriptEngineSwitcher.Msie" />
      <section name="v8" type="JavaScriptEngineSwitcher.V8.Configuration.V8Configuration, JavaScriptEngineSwitcher.V8" />
    </sectionGroup>
  </configSections>  
  <connectionStrings>
    some conn strings
  </connectionStrings>    
  <location path="." inheritInChildApplications="false">
    <appSettings>
      <add key="webpages:Version" value="3.0.0.0" />
      <add key="webpages:Enabled" value="false" />
      <add key="ClientValidationEnabled" value="true" />
      <add key="UnobtrusiveJavaScriptEnabled" value="true" />      
      <add key="webpages:Enabled" value="true" />
      <add key="webpages:Version" value="3.0.0.0" />
    </appSettings>
  </location>
  <location path="." inheritInChildApplications="false">
    <system.web>      
      <authentication mode="None" />
      <compilation debug="true" targetFramework="4.5" />
      <httpRuntime targetFramework="4.5" />
      <httpHandlers>
        <add path="*.png" verb="*" type="System.Web.StaticFileHandler" validate="true" />
        <add path="*.js" verb="*" type="System.Web.StaticFileHandler" validate="true" />        
      </httpHandlers>      
    </system.web>
  </location>
  <location path="." inheritInChildApplications="false">
    <system.webServer>    
      <validation validateIntegratedModeConfiguration="false" />
      <modules runAllManagedModulesForAllRequests="true">
        <remove name="FormsAuthentication" />
      </modules>
      <staticContent>
        <remove fileExtension=".eot" />
        <remove fileExtension=".ttf" />
        <remove fileExtension=".otf" />
        <remove fileExtension=".woff" />
        <remove fileExtension=".woff2" />
        <mimeMap fileExtension=".eot" mimeType="application/vnd.ms-fontobject" />
        <mimeMap fileExtension=".ttf" mimeType="font/ttf" />
        <mimeMap fileExtension=".otf" mimeType="font/otf" />
        <mimeMap fileExtension=".woff" mimeType="application/font-woff" />
        <mimeMap fileExtension=".woff2" mimeType="application/font-woff" />
        <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="14.00:00:00" />
      </staticContent>
      <security>
        <requestFiltering>
          <hiddenSegments>
            <add segment="ClearScript.V8" />
          </hiddenSegments>
        </requestFiltering>
      </security>
      <handlers>
        <remove name="Babel" />
        <add name="Babel" verb="GET" path="*.jsx" type="React.Web.BabelHandlerFactory, React.Web" preCondition="integratedMode" />
      </handlers>     
      <directoryBrowse enabled="false" />
    </system.webServer>
  </location>  
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <jsEngineSwitcher xmlns="http://tempuri.org/JavaScriptEngineSwitcher.Configuration.xsd">
    <core>
      <engines>
        <add name="MsieJsEngine" type="JavaScriptEngineSwitcher.Msie.MsieJsEngine, JavaScriptEngineSwitcher.Msie" />
        <add name="V8JsEngine" type="JavaScriptEngineSwitcher.V8.V8JsEngine, JavaScriptEngineSwitcher.V8" />
      </engines>
    </core>
  </jsEngineSwitcher>
</configuration>

We've tried everything we can find online and nothing is working :( Would really appreciate some help!

Here is an answer of IIS, Node.js, and Web Application with IISNode not configured right with Virtual Directory, which is in the same scenario with you. I tested this answer on locally, and it worked fine.

I built an empty MVC application, and put a simple expressjs application into it with the web.config similar with http://tstrimple.com/express-4-azure-websites/.

And I didn't config any location tag in the MVC's web.config file.

Any further concern, please feel free to let me know.