FROM openjdk:18-alpine

# Install git
RUN apk add git

# Make /kaboom directory
RUN mkdir /kaboom
RUN chown -Rfv nobody:nobody /kaboom

# Change user
USER nobody
WORKDIR /kaboom

# Download kaboom server
RUN git clone https://github.com/kaboomserver/server.git server
WORKDIR /kaboom/server

# Make some directories read only
# Paths copied from https://github.com/kaboomserver/framework/blob/master/script/server.sh#L26
RUN mkdir debug/ dumps/ plugins/update/
RUN chmod -R 500 debug/ dumps/ plugins/bStats/ plugins/PluginMetrics/ plugins/update/

# Run the server
# Args copied from https://github.com/kaboomserver/framework/blob/master/script/server.sh#L45
CMD [ "java", "-jar", "-Xshare:on", "-Xss8M", "-XX:MaxDirectMemorySize=512M", "-XX:+UseContainerSupport", "-DPaper.IgnoreJavaVersion=true", "-Dpaper.playerconnection.keepalive=360", "-DIReallyKnowWhatIAmDoingISwear", "-jar", "server.jar", "nogui" ]