build: Optimize Dockerfile (#498)

FROM debian:trixie-slim

ARG DEBCONF_NOWARNINGS "yes"

ARG DEBIAN_FRONTEND "noninteractive"

ARG DEBCONF_NONINTERACTIVE_SEEN "true"

ARG VERSION_ARG="0.0"

ARG VERSION_VNC="1.4.0"

RUN apt-get update && \

ARG DEBCONF_NOWARNINGS="yes"

ARG DEBIAN_FRONTEND="noninteractive"

ARG DEBCONF_NONINTERACTIVE_SEEN="true"

RUN set -eu && \

    apt-get update && \

    apt-get --no-install-recommends -y install \

        tini \

        wget \

        netcat-openbsd \

        qemu-system-x86 && \

    apt-get clean && \

    novnc="1.4.0" && \

    mkdir -p /usr/share/novnc && \

    wget https://github.com/novnc/noVNC/archive/refs/tags/v"$novnc".tar.gz -O /tmp/novnc.tar.gz -q && \

    wget "https://github.com/novnc/noVNC/archive/refs/tags/v${VERSION_VNC}.tar.gz" -O /tmp/novnc.tar.gz -q --timeout=10 && \

    tar -xf /tmp/novnc.tar.gz -C /tmp/ && \

    cd /tmp/noVNC-"$novnc" && \

    cd "/tmp/noVNC-${VERSION_VNC}" && \

    mv app core vendor package.json *.html /usr/share/novnc && \

    unlink /etc/nginx/sites-enabled/default && \

    sed -i 's/^worker_processes.*/worker_processes 1;/' /etc/nginx/nginx.conf && \

    echo "$VERSION_ARG" > /run/version && \

    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

COPY ./src /run/

COPY ./web /var/www/

RUN chmod +x /run/*.sh

RUN mv /var/www/nginx.conf /etc/nginx/sites-enabled/web.conf

COPY --chmod=755 ./src /run/

COPY --chmod=755 ./web /var/www/

COPY --chmod=744 ./web/nginx.conf /etc/nginx/sites-enabled/web.conf

VOLUME /storage

EXPOSE 22 5900 8006

ENV DISK_SIZE "16G"

ENV BOOT "http://example.com/image.iso"

ARG VERSION_ARG "0.0"

RUN echo "$VERSION_ARG" > /run/version

ENTRYPOINT ["/usr/bin/tini", "-s", "/run/entry.sh"]