Add emacs to the default packages
Rename Dockerfile to Dockerfile-1
Add Dockerfile-2 to echo "Hey dude" at container startup
Add Dockerfile to execute "wc -l" at container startup using the "exec"
format for the ENTRYPOINT instruction
Add ENTRYPOINT to run memcached as daemon user at container startup
Now the container is run as daemon user and starts memcached at startup time
Remove emacs from default package
Expose the port used by the memcached process