FROM alpine:latest
ARG VERSION
RUN mkdir -p /opt/server
WORKDIR /opt/server
RUN apk add openjdk21 jq curl
RUN if [[ -z $VERSION ]] ; then VERSION=$(curl https://api.papermc.io/v2/projects/paper | jq -r .versions[-1]); fi;\
    curl -o server.jar $(\
                        curl https://api.papermc.io/v2/projects/paper/versions/${VERSION}/builds |\
                        jq -r --arg VERSION $VERSION '"https://api.papermc.io/v2/projects/paper/versions/" \
                                + $VERSION \
                                + "/builds/" \
                                + (.builds[-1].build|tostring) \
                                + "/downloads/" \
                                + (.builds[-1].downloads.application.name)'\
                        )
COPY eula.txt eula.txt
RUN adduser minecraft -h /opt/server
USER minecraft:minecraft
RUN chmod 111 server.jar
ENTRYPOINT [ "java", "-jar",  "server.jar" ]