Dockerfile

# Setup base image
FROM alpine:3 AS base

LABEL maintainer="BrammyS <https://github.com/BrammyS>"
LABEL org.label-schema.name="brammys/necesse-server"
LABEL org.label-schema.description="A Docker image for a dedicated Necesse game server."
LABEL org.label-schema.vendor="BrammyS"
LABEL org.label-schema.url="https://github.com/BrammyS/necesse-docker-server"
LABEL org.label-schema.docker.cmd="docker run -d -v /necesse/saves:/necesse/saves -p 14159:14159/udp -e PASSWORD=strong_pass -e PAUSE=1 --restart=always --name necesse-server brammys/necesse-server"

# Misc configurations.
ARG version
ARG build
ARG url
EXPOSE 14159/udp
VOLUME ["/necesse/logs", "/necesse/saves", "/necesse/cfg"]

# Server configs.
ENV WORLD=world
ENV SLOTS=10
ENV OWNER=""
ENV MOTD="This server is made possible by Docker!"
ENV PASSWORD=""
ENV PAUSE=0
ENV GIVE_CLIENTS_POWER=1
ENV LOGGING=1
ENV ZIP=1
ENV JVMARGS=""

# Install java, wget and unzip and cleanup package cache.
RUN apk --update add wget unzip && \
    apk add openjdk17 && \
    rm -rf /var/cache/apk/*

# Setup build image
FROM base AS build

# Install necesse server files.
RUN wget -O /tmp/necesse-server.zip "${url}" && \
    unzip /tmp/necesse-server.zip && \
    rm -rf "/necesse-server-${version}-${build}/jre" && \
    rm -f /tmp/necesse-server.zip

# Setup final image
FROM base AS final

# Move server files to generic necesse folder.
COPY --from=build /necesse-server-${version}-${build} /necesse/

WORKDIR /necesse

ENTRYPOINT ["sh", "-c", "exec java ${JVMARGS} -jar Server.jar -nogui -localdir -world \"${WORLD}\" -slots \"${SLOTS}\" -owner \"${OWNER}\" -motd \"${MOTD}\" -password \"${PASSWORD}\" -pausewhenempty \"${PAUSE}\" -giveclientspower \"${GIVE_CLIENTS_POWER}\" -logging \"${LOGGING}\" -zipsaves \"${ZIP}\""]