Initial commit — DRB client (edge node) stack

Includes edge-node (FastAPI/MQTT/Discord voice), op25-container (SDR decoder),
and icecast (audio streaming).

icecast/Dockerfile

@@ -0,0 +1,18 @@
+FROM debian:bookworm-slim
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y \
+    icecast2 \
+    gettext-base \
+    gosu \
+    && rm -rf /var/lib/apt/lists/* \
+    && id icecast 2>/dev/null || adduser --system --group --no-create-home icecast
+
+COPY icecast.xml.template /etc/icecast2/icecast.xml.template
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 8000
+
+ENTRYPOINT ["/entrypoint.sh"]