FROM alpine:3.23

RUN apk add --no-cache signal-cli && \
    adduser -D -u 1000 signal && \
    mkdir -p /home/signal/.signal-cli /home/.local/share/signal-cli && \
    chown -R signal:signal /home/signal /home/.local/share/signal-cli

USER signal
CMD ["signal-cli", "--config", "/home/.local/share/signal-cli", "daemon", "--socket", "/home/signal/.signal-cli/socket"]