Build the image using the following command

$ docker build -t friendlyhello .

Run the Docker container using the command shown below.

$ docker run -d -p 4000:80 friendlyhello

Use -e to override the NAME environment variable.

$ docker -e NAME=foobar run -d -p 4000:80 friendlyhello

The application will be accessible at http://localhost:4000

$ curl http://localhost:4000