Initial commit — DRB client (edge node) stack

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

op25-container/docker-entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# --- Start PulseAudio Daemon ---
+# The -D flag starts it as a daemon. 
+# The --exit-idle-time=-1 prevents it from automatically shutting down.
+echo "Starting PulseAudio daemon..."
+pulseaudio -D --exit-idle-time=-1 --system
+
+# Wait a moment for PulseAudio to initialize
+sleep 1
+
+# --- Execute the main command (uvicorn) ---
+echo "Starting FastAPI application..."
+# The main application arguments are passed directly to this script
+exec "$@"