Docker Running containers Binding a container port to the host
Example
docker run -p "8080:8080" myApp
docker run -p "192.168.1.12:80:80" nginx
docker run -P myApp
In order to use ports on the host have been exposed in an image (via the EXPOSE Dockerfile directive, or --expose command line option for docker run), those ports need to be bound to the host using the -p or -P command line options. Using -p requires that the particular port (and optional host interface) to be specified. Using the uppercase -P command line option will force Docker to bind all exposed ports in a container's image to the host.
