Write one Dockerfile to build 1 App Nodejs open 2 port

I would like to build dockerfile app nodejs with 2 port: 5000 and 5001

index.js

const port = 5001, port_image = 5001;

app.listen(port, () => console.log(`Server started on port ${port}`));
app_image.listen(port_image, () => console.log(`Server started on port ${port}`));

Dockerfile

FROM node:10
RUN npm install -g nodemon
WORKDIR /api_kgp/docker_build
COPY package.json ./
RUN npm install
COPY . .
CMD node index.js
#Expose port and start application
EXPOSE 5000
EXPOSE 5001
CMD [ "npm", "start" ]

script to build

sudo docker build -t api_site .
sudo docker run -p 5000:5000 -p 5001:5001 --restart=always api_site 
```

5000 for api site
5001 for image site. 

How to build dockerfile for 2 port this.?

Source: StackOverflow