If you want to access a running application inside a docker container you need to expose the ports to the host system, this can be achieved through flags.
- The
-Pflag maps all the internal ports (which are defined inside the Dockerfile with EXPOSE) to the host machine, it assigns a port automatically e.g.docker run -P --name my-docker-container mysql - The
-pflag maps a specified port to a specified port on the host machine,<host_port>:<container_port>e.g.docker run -name my-app -p 3306:3306 -p 80:3002 myCustomAppImage