This is a simple example of an app that uses Docker.
There are two ways you can use this app:
docker build -t my-image .
docker run -p 4000:4000 --name my-app -d my-image
docker-compose up -d
First, make sure that the process is running properly:
docker ps
You should see it there.
Then navigate to localhost:4000
in your browser and you should see the expected output.