If you have go installed, you can simply type ./install.sh and you're good to go.
You can also use the docker file.
docker build -t rpkamp-go-raffler .
docker run -i -t -v <path to raffler files>:/var/names.txt rpkamp-go-raffler /var/data/<raffle file>
eg
docker run -i -t -v /home/rpkamp/names.txt:/var/names.txt rpkamp-go-raffler /var/data/raffler.txt
The Docker container will open the file /var/names.txt as input for the raffler.