hostconfig with tmpfs

[viktortnk]

Closes #83

[alienscience]

Many thanks, this works great and gave the performance increase we were expecting.

In case anybody is reading this in the future, this is how to use tmpfs:

  // Run the app on tmpfs -- this improves peformance especially on OSX
  val hostConfig = HostConfig(tmpfs = Some(Map("/YOUR/mountpoint/here" -> "rw,size=250M")))

  // Then add hostConfig when creating the docker container
  val myContainer = DockerContainer(containerName)
    .withPorts(MyPort -> None)
    .withReadyChecker(
      DockerReadyChecker.LogLineContains(
        "Your ready checker here"
      )
    )
    .withHostConfig(hostConfig)