run ls in dockerfile code example

Example 1: docker exec bash

//For executing commands in the container
docker exec -it <CONTAINER_NAME> bash

Example 2: docker run name

docker run --name <container name> -dp <local port>:<container port> <image>

Example 3: docker expose port

docker run -p [external]:[Internal]

#example (will open in localhost:8080 to container port 80)
docker run -p 8080:80