Use Alpine instead of the OpenJDK upstream image
Thinner and actually respects that JRE_VERSION var we added
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@ -6,7 +6,7 @@ ARG MINECRAFT_VERSION="1.16.5"
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ARG FORGE_VERSION="36.2.26"
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ARG JRE_VERSION="openjdk8-jre"
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# The actual setup work
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# Build us up the basics of the Minecraft server environment
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COPY start-server.sh /minecraft/start-server.sh
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WORKDIR /minecraft
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RUN apk add curl "${JRE_VERSION}" &&\
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@ -16,9 +16,9 @@ RUN apk add curl "${JRE_VERSION}" &&\
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rm installer.jar installer.jar.log && \
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ln -s "forge-${MINECRAFT_VERSION}-${FORGE_VERSION}.jar" server.jar
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# The second stage is the actual container
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FROM openjdk:11
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RUN apt-get update && apt-get install rsync screen -y
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# Stuff them in a smaller container with fewer layers
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FROM alpine:latest
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RUN apk add bash rsync screen "${JRE_VERSION}"
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WORKDIR /minecraft
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COPY --from=build /minecraft .
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CMD [ "bash", "start-server.sh" ]
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