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self-hosting/minecraft/papermc/Dockerfile

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FROM openjdk:11-jre-slim
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# Build arguments
ARG MC_VERSION
ARG PAPERMC_VERSION
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# Install mcstatus for healthchecks
RUN apt update && \
apt install --no-install-recommends -y python3-minimal python3-setuptools python3-pip && \
python3 -m pip install mcstatus && \
apt --purge remove -y python3-pip python3-setuptools && \
apt clean
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# Create worlds and config directory
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WORKDIR /app
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RUN mkdir worlds config
# Download server file
ADD "https://papermc.io/api/v1/paper/$MC_VERSION/$PAPERMC_VERSION/download" server.jar
# Store the cache in an anonymous volume, which means it won't get stored in the other volumes
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VOLUME /app/config/cache
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# Default value to keep users from eating up all ram accidentally
ENV XMS=4
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# Document exposed ports
EXPOSE 25565
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# Entrypoint runs in /app/config
COPY entrypoint.sh /entrypoint.sh
WORKDIR /app/config
ENTRYPOINT /entrypoint.sh
HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
CMD mcstatus localhost:25565 ping