Dockerfile

# start with a micro image
FROM accursoft/micro-debian:latest

# environment variables
ENV STEAMCMD /steamcmd
ENV PATH $STEAMCMD:$PATH
ENV CONFIG /config
ENV PATH $CONFIG:$PATH
ENV SCRIPT jc2.config
ENV INIT start-jc2.sh
ENV USERNAME anonymous
ENV PASSWORD ""

# ports
# 7777 => game port, 27015 => query port, 20560 => steam
EXPOSE 7777 27015 20560

# set our working directory to steamcmd
WORKDIR /steamcmd

# make a directory for our server scripts
RUN mkdir /config

# copy our server and config file to /config
COPY config/ $CONFIG

# install dependencies
RUN apt-get update && \
    apt-get install -y lib32gcc1 curl bash && \
    apt-get clean

# download steamcmd and un-tar it
RUN curl -sqL 'https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz' | tar zxvf -

# copy our docker-entrypoint.sh script to /steamcmd
COPY docker-entrypoint.sh $STEAMCMD

# create a mount point for our config dir
VOLUME ${CONFIG}

# start steamcmd
CMD ["bash", "-c", "./docker-entrypoint.sh"]