Dockerfile

# taken from https://github.com/linuxserver/docker-baseimage-kasmvnc/blob/debianbookworm/Dockerfile
# modified to apply 'novnc.patch' (fixing a disconnect/reconnect issue)
FROM node:12-buster AS wwwstage

ARG KASMWEB_RELEASE="5ba4695e6526a27b8e38ec8d55dc33b39143e68a"

RUN \
  echo "**** build clientside ****" && \
  mkdir /src && \
  cd /src && \
  wget https://github.com/kasmtech/noVNC/tarball/${KASMWEB_RELEASE} -O - \
    | tar  --strip-components=1 -xz

COPY ./patches/novnc.patch /src/
RUN \
  export QT_QPA_PLATFORM=offscreen && \
  export QT_QPA_FONTDIR=/usr/share/fonts && \
  echo "apply novnc.patch" && \
  cd /src && \
  patch -p1 -i novnc.patch && \
  npm install && \
  npm run-script build

RUN \
  echo "**** organize output ****" && \
  mkdir /build-out && \
  cd /src && \
  rm -rf node_modules/ && \
  cp -R ./* /build-out/ && \
  cd /build-out && \
  rm *.md && \
  rm AUTHORS && \
  cp index.html vnc.html && \
  mkdir Downloads

FROM ghcr.io/linuxserver/baseimage-kasmvnc:debianbookworm-f7a8978f-ls89 AS buildstage

# these are specified in Makefile
ARG ARCH
ARG PLATFORM
ARG SPARROW_VERSION
ARG SPARROW_DEBVERSION
ARG SPARROW_PGP_SIG
ARG YQ_VERSION
ARG YQ_SHA

RUN \
  echo "**** install packages ****" && \
  apt-get update && \
  DEBIAN_FRONTEND=noninteractive \
  apt-get install -y --no-install-recommends \
    exo-utils \
    mousepad \
    xfce4-terminal \
    tumbler \
    thunar \
    # from 'recommended packages', solves a few warnings
    thunar-archive-plugin \
    librsvg2-common \
    python3-xdg \
    # dark theme
    hsetroot \
    gnome-themes-extra \
    compton \
    # desktop notifications
    xfce4-notifyd \
    libnotify-bin \
    notification-daemon \
    xclip \
    # other
    wget \
    socat \
    gnupg && \
  # remove unused packages from base image
  DEBIAN_FRONTEND=noninteractive \
  apt-get remove --purge --autoremove -y \
    containerd.io \
    cpp \
    cpp-12 \
    docker-ce \
    docker-ce-cli \
    docker-buildx-plugin \
    docker-compose-plugin \
    fonts-noto-color-emoji \
    fonts-noto-core \
    intel-media-va-driver \
    mesa-va-drivers \
    mesa-vulkan-drivers \
    x11-apps \
    xserver-xorg-video-amdgpu \
    xserver-xorg-video-ati \
    xserver-xorg-video-intel \
    xserver-xorg-video-nouveau \
    xserver-xorg-video-qxl \
    xserver-xorg-video-radeon \
    perl \
    locales-all && \
  # remove left-over locales and generate default
  rm -rf $(ls -d /usr/share/locale/* | grep -vw /usr/share/locale/en) && \
  localedef -i en_US -f UTF-8 en_US.UTF-8 && \
  # upgrade remaining packages
  DEBIAN_FRONTEND=noninteractive \
  apt-get upgrade -y && \
  # install yq
  wget -qO /tmp/yq https://github.com/mikefarah/yq/releases/download/v${YQ_VERSION}/yq_linux_${PLATFORM} && \
  echo "${YQ_SHA} /tmp/yq" | sha256sum --check || exit 1 && \ 
  mv /tmp/yq /usr/local/bin/yq && chmod +x /usr/local/bin/yq && \
  echo "**** xfce tweaks ****" && \
  rm -f /etc/xdg/autostart/xscreensaver.desktop && \
  # StartOS branding
  echo "Starting Sparrow on Webtop for StartOS..." > /etc/s6-overlay/s6-rc.d/init-adduser/branding; sed -i '/run_branding() {/,/}/d' /docker-mods && \
  # cleanup and remove some unneeded large binaries
  echo "**** cleanup ****" && \
  rm /kasmbins/kasm_webcam_server && \
  apt-get autoclean && \
  rm -rf \
    /config/.cache \
    /var/lib/apt/lists/* \
    /var/tmp/* \
    /tmp/*

# Sparrow
RUN \
  echo "**** install Sparrow ****" && \
  # sparrow requires this directory to exist
  mkdir -p /usr/share/desktop-directories/ && \
  # Download and install Sparrow (todo: gpg sig verification)
  wget --quiet https://github.com/sparrowwallet/sparrow/releases/download/${SPARROW_VERSION}/sparrow_${SPARROW_DEBVERSION}_${PLATFORM}.deb \
               https://github.com/sparrowwallet/sparrow/releases/download/${SPARROW_VERSION}/sparrow-${SPARROW_VERSION}-manifest.txt \
               https://github.com/sparrowwallet/sparrow/releases/download/${SPARROW_VERSION}/sparrow-${SPARROW_VERSION}-manifest.txt.asc \
               https://keybase.io/craigraw/pgp_keys.asc && \
  # verify pgp and sha signatures
  gpg --import pgp_keys.asc && \
  gpg --status-fd 1 --verify sparrow-${SPARROW_VERSION}-manifest.txt.asc | grep -q "GOODSIG ${SPARROW_PGP_SIG} Craig Raw <craig@sparrowwallet.com>" || exit 1 && \
  sha256sum --check sparrow-${SPARROW_VERSION}-manifest.txt --ignore-missing || exit 1 && \
  DEBIAN_FRONTEND=noninteractive \
  apt-get install -y ./sparrow_${SPARROW_DEBVERSION}_${PLATFORM}.deb && \
  # cleanup
  rm ./sparrow* ./pgp_keys.asc

# start from scratch so we create smaller layers in the resulting image
FROM scratch

COPY --from=buildstage / .
COPY --from=wwwstage /build-out /usr/local/share/kasmvnc/www

# since we start from scratch, we need these env variables from the base images
ENV \
  # from ghcr.io/linuxserver/baseimage-debian:bookworm (https://github.com/linuxserver/docker-baseimage-debian/blob/master/Dockerfile)
  HOME="/root" \
  LANGUAGE="en_US.UTF-8" \
  LANG="en_US.UTF-8" \
  TERM="xterm" \
  S6_CMD_WAIT_FOR_SERVICES_MAXTIME="0" \
  S6_VERBOSITY=1 \
  S6_STAGE2_HOOK=/docker-mods \
  VIRTUAL_ENV=/lsiopy \
  PATH="/lsiopy/bin:$PATH" \
  # from ghcr.io/linuxserver/baseimage-kasmvnc:debianbookworm (https://github.com/linuxserver/docker-baseimage-kasmvnc/blob/debianbookworm/Dockerfile)
  DISPLAY=:1 \
  PERL5LIB=/usr/local/bin \
  OMP_WAIT_POLICY=PASSIVE \
  GOMP_SPINCOUNT=0 \
  HOME=/config \
  # base container starts docker by default, but we removed it, so set to false
  START_DOCKER=false \
  PULSE_RUNTIME_PATH=/defaults \
  NVIDIA_DRIVER_CAPABILITIES=all \
  # set dark theme
  GTK_THEME=Adwaita:dark \
  GTK2_RC_FILES=/usr/share/themes/Adwaita-dark/gtk-2.0/gtkrc \
  # prevent kasm from touching our rc.xml
  NO_FULL=1

# add local files
COPY /root /
COPY --chmod=755 ./docker_entrypoint.sh /usr/local/bin/docker_entrypoint.sh
COPY --chmod=664 icon.png /kclient/public/icon.png
COPY --chmod=664 icon.png /kclient/public/favicon.ico

# ports and volumes
EXPOSE 3000
VOLUME /config