Rocrail Docker

Run rocrail on a Docker containter.

This Docker image will help run rocrail on linux distibutions and environments not relased by rocrail.

How to use it

Build the image (first time, or if there is a new rocrail version).
```
docker build -t rocrail .
```

You can choose the base OS distribution release and rocrail version:

docker build --build-arg=ROCRAIL_VERSION=1234 --build-arg=DEBIAN_VERSION=12 -t rocrail .

Create rocrail directory (if needed):

export ROCRAIL_DIR=${HOME}/rocrail
mkdir -pv ${ROCRAIL_DIR}