How can I expose more than 1 port with Docker?

if you use docker-compose.ymlfile:

services:
    varnish:
        ports:
            - 80
            - 6081

You can also specify the host/network port as HOST/NETWORK_PORT:CONTAINER_PORT

varnish:
    ports:
        - 81:80
        - 6081:6081

In your Dockerfile, you can use the verb EXPOSE to expose multiple ports.
e.g.

EXPOSE 3000 80 443 22

You then would like to build an new image based on above Dockerfile.
e.g.

docker build -t foo:tag .

Then you can use the -p to map host port with the container port, as defined in above EXPOSE of Dockerfile.
e.g.

docker run -p 3001:3000 -p 23:22

In case you would like to expose a range of continuous ports, you can run docker like this:

docker run -it -p 7100-7120:7100-7120/tcp

To expose just one port, this is what you need to do:

docker run -p <host_port>:<container_port>

To expose multiple ports, simply provide multiple -p arguments:

docker run -p <host_port1>:<container_port1> -p <host_port2>:<container_port2>

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