Signal XPRA

docker-compose.yml

version: '3.4'

services:
  signal-xpra:
    build: .
    restart: unless-stopped
    ports:
      - 14500:14500
    environment:
      - DEBIAN_FRONTEND=noninteractive
      - XPRA_PASSWORD=secret
    volumes:
      - signal-data:/home/xpra/.config/Signal

volumes:
  signal-data:
    name: signal-data
    external: true

Dockerfile

FROM ffeldhaus/xpra-html5-minimal

RUN mv /etc/apt/sources.list.d/xpra.list /etc/apt/sources.list.d/xpra.list.bak && \
    apt-get update -y && \
    apt-get install -y --no-install-recommends curl dirmngr gnupg2 ca-certificates gpg && \
    curl -s https://xpra.org/xpra.asc | gpg --dearmor | apt-key --keyring /etc/apt/trusted.gpg.d/xpra-apt-key.gpg add && \
    curl -s https://updates.signal.org/desktop/apt/keys.asc | gpg --dearmor > /usr/share/keyrings/signal-desktop-keyring.gpg && \
    mv /etc/apt/sources.list.d/xpra.list.bak /etc/apt/sources.list.d/xpra.list && \
    echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] https://updates.signal.org/desktop/apt xenial main' > /etc/apt/sources.list.d/signal-xenial.list && \
    apt-get update -y && \
    apt-get upgrade -y --no-install-recommends && \
    apt-get install -y --no-install-recommends libatk-bridge2.0-0 libgtk-3-0 libgbm1 signal-desktop && \
    chmod 4755 /opt/Signal/chrome-sandbox && \
    rm -rf /var/lib/apt/lists

CMD "signal-desktop --no-sandbox --disable-dev-shm-usage --no-xshm"