Now when you say SSH I assume just get into the container from the host and if so , yes there is a standard method for exactly what you have described.
First you will need to get the name of your container or its ID.
$ docker ps
This will list all the docker containers running in your host. Copy either the name or the ID and use it the command below:
$ docker exec -it < Name_of_container > bash
Using the above command you can get inside your container and use a terminal to run commands and traverse through the directories of your container.
But if you want to use SSH it self you can also do that, but it is not the standard way to get into a container.
Type in the commands given below :
apt-get install openssh-server
chmod 0755 /var/run/sshd
useradd --create-home --shell /bin/bash --groups sudo username ## includes 'sudo'
passwd username ## Enter a password
Now you will be able to SSH into the docker container.
Also If you want to become more adept with docker you can check this Docker training course . You will be trained by industry professionals who have years of experience in docker. Or you can refer to the docker tutorial for beginners blog.