Docker :: Node Hello World Example :: SyntaxError: Invalid or unexpected token? - node.js

Question

I am trying to run this hello world example on node within a docker container
https://medium.com/#adnanrahic/hello-world-app-with-node-js-and-express-c1eb7cfa8a30
Here is my dockerfile:
#escape=`
FROM microsoft/nanoserver
ADD https://nodejs.org/dist/v8.11.1/node-v8.11.1-win-x64.zip C:\node-v8.11.1-win-x64.zip
RUN powershell -Command Expand-Archive C:\node-v8.11.1-win-x64.zip C:\; Rename-Item C:\node-v8.11.1-win-x64 node; `
SETX PATH C:\node;
SHELL ["powershell", "-Command"]
RUN mkdir hello-world; `
cd c:\hello-world; `
npm init -f; `
(Get-Content C:\hello-world\package.json) | `
ForEach-Object { $_ -replace 'index.js', 'app.js' } | `
Set-Content C:\hello-world\package.json; `
npm install express --save; `
echo \""var express = require('express');\"" > app.js; `
echo \""var app = express();\"" >> app.js; `
echo \""app.get('/', function (req, res) {\"" >> app.js; `
echo \"" res.send('Hello World!');\"" >> app.js; `
echo \""});\"" >> app.js; `
echo \""app.listen(3000, function () {\"" >> app.js; `
echo \"" console.log('Example app listening on port 3000!');\"" >> app.js; `
echo \""});\"" >> app.js; `
del c:\node-v8.11.1-win-x64.zip
EXPOSE 3000
ENTRYPOINT node c:\hello-world\app.js
after building the container successsfully:
docker build . -t nano-node-hw
and run it, I get the following error:
PS C:\Users\user\Docker\Node> docker run -it -p 3000:3000 --name node-hello nano-node-hw
c:\hello-world\app.js:1
(function (exports, require, module, __filename, __dirname) { ??v
^
SyntaxError: Invalid or unexpected token
at createScript (vm.js:80:10)
at Object.runInThisContext (vm.js:139:10)
at Module._compile (module.js:616:28)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)
at startup (bootstrap_node.js:188:16)
at bootstrap_node.js:609:3
I did these same steps on my laptop (Windows 10) running node locally and had no issues.. what gives??