Added Working Dockerfile

[frank-dspeed]

Hello my Frind i use Your Board and like it so i whant to contribute a dockerfile to it

You can now do

# Build the Image
git clone https://github.com/AF83/koalab
cd koalab
docker build -t koalab .

# Run Container mapped to port 9000 on dockerhost
docker run -d -p 9000:80 koalab

# Have Fun
after that firefox http://localhost:9000