FROM debian:stretch-slim MAINTAINER Daigo Moriwaki RUN apt-get update && apt-get install -y \ ca-certificates \ apt-utils \ ruby ruby-gsl ENV EVENT local ENV PORT 4081 ENV MAX_IDENTIFIER 32 WORKDIR /shogi-server RUN mkdir /logs RUN gem install rgl COPY . ./ EXPOSE $PORT CMD ./shogi-server --daemon /logs --max-identifier $MAX_IDENTIFIER $EVENT $PORT & tail -F /logs/shogi-server.log