title: installing ssh in the docker containers
body: <p>i have a ubuntu machine that hosts a docker container.
      and in the docker container i am running a web service which must validate 
      the user's password with the docker host's /etc/password.</p>
  
  <p>my view is to ssh into docker host from the docker container.
      so when i run command ssh in the docker container its saying ssh not found.
      so,basically ssh is not installed in the container.
      how can i install ssh in the container.
      is there any way to accomplish this scenario?.</p>