add listener dockerfile

.dockerignore

@@ -1 +1,3 @@
 server/.env
+listener/target
+listener/config.toml

Dockerfile.listener

@@ -0,0 +1,36 @@
+################################################################################
+# App builder stage
+FROM rust:1.96.0-trixie@sha256:fb328f0f58becb23ba1719940a2c94ece8b0b48afa837d05b79ef64bc1e18f6e AS app-builder
+
+RUN apt update && \
+    apt install -y --no-install-recommends libclang-dev cmake protobuf-compiler
+
+COPY listener/ /opt/listener
+COPY server/proto /opt/server/proto
+WORKDIR /opt/listener
+
+RUN cargo build --release
+
+################################################################################
+# FFmpeg builder stage
+FROM debian:13-slim@sha256:b6e2a152f22a40ff69d92cb397223c906017e1391a73c952b588e51af8883bf8 AS ffmpeg-builder
+RUN apt-get update && \
+  apt-get install -y --no-install-recommends ffmpeg
+RUN mkdir -p /rootfs/bin && \
+  cp /usr/bin/ffmpeg /usr/bin/ffprobe /rootfs/bin/ && \
+  { ldd /usr/bin/ffmpeg; ldd /yt-dlp; } 2>/dev/null | \
+  grep -o '/[^ ]*' | sort -u | \
+  xargs -I '{}' cp --parents '{}' /rootfs && \
+  LIBDIR=$(dirname "$(find /rootfs -name 'libc.so.6' | head -1)") && \
+  for stub in libutil.so.1 libdl.so.2 libpthread.so.0 librt.so.1; do \
+    [ -f "${LIBDIR}/${stub}" ] || ln -sf libc.so.6 "${LIBDIR}/${stub}"; \
+  done
+
+################################################################################
+# Final squashed image
+FROM gcr.io/distroless/cc-debian13 AS final
+
+# Copy listener library
+COPY --from=ffmpeg-builder /rootfs/ /
+COPY --from=app-builder /opt/listener/target/release/scannerbot-listener /bin/
+ENTRYPOINT ["/bin/scannerbot-listener"]