= Docker =

Docker is a tool for containerizing (basically VM'ing) programs

== Install ==

On gentoo install docker as directed, and enable all of the required flags on
the wiki (they change with different versions)

== Setup ==

the `docker` command is all thats needed to run a container.

== docker-compose ==

Docker-compose allows you to automate setting up several containers into a
single command.

=== ports ===

* expose a port in the container to the world
* below binds port 8080 of the container to reply to any IP on the host at port
  80

{{{
ports:
  - 0.0.0.0:80:8080/tcp
  }}}

=== volumes ===

* mount a folder on the filesystem inside the container

== Useful commands ==

=== Get a shell on a container ===

`docker exec -it <CONTAINER_ID> /bin/bash`