DockerFile

FROM eclipse-temurin:17

ARG MINECRAFT_VERSION=1.20.4

ENV MINECRAFT_VERSION=${MINECRAFT_VERSION}
ENV DEBIAN_FRONTEND=noninteractive

WORKDIR /app

# Fetch the latest release information and download the second JAR file from the assets
RUN apt-get update && apt-get install -y curl jq \
    && filename=$(curl -s https://api.github.com/repos/kettingpowered/kettinglauncher/releases/latest | jq -r '.assets[] | select(.name | contains("sources.jar") | not) | .browser_download_url') \
    && echo "Downloading ${filename}" \
    && curl -L ${filename} -o launcher.jar \
    && rm -rf /var/lib/apt/lists/*

ENTRYPOINT ["java", "-jar", "/app/launcher.jar"]