Node.js Docker container on Windows won't work

I've just started using Docker and wanted to set up a simple nodejs container. I downloaded Docker Toolbox for Windows, followed some tutorials and was able to get it up and running. Since then, for some reason it has stopped working. Here's what I have so far:

Dockerfile

FROM node:7.8.0

WORKDIR /usr/src/app

COPY . .

RUN npm install --quiet --no-bin-links

RUN npm install --quiet -g nodemon@1.11.0

EXPOSE 8080

CMD ["node", "server/server.js"]

package.json

{
  "name": "docker",
  "version": "1.0.0",
  "description": "Node.js on Docker",
  "main": "server/server.js"
}

server/server.js

'use strict';

var http = require("http");

const PORT = 8080;

http.createServer(function (request, response) {
   // Send the HTTP header 
   // HTTP Status: 200 : OK
   // Content Type: text/plain
   response.writeHead(200, {'Content-Type': 'text/plain'});

   // Send the response body as "Hello World"
   response.end('Hello World\n');
}).listen(PORT, "0.0.0.0");

console.log('Running on port: ' + PORT);

Start command

docker run -d -p 8080:8080 --name backend -v $PWD/server:/usr/src/app/server/ my_node_image nodemon --legacy-watch server/server.js

Like I said above, this was working a few days ago. The server runs currently, but I cannot access it from my main computer via localhost:8080 as I did before.

via Jase Pellerin