Add listen to Unix websocket (#484)

scripts/watch.sh

@@ -1,8 +1,23 @@
 #!/bin/sh
 set -euo pipefail
 
+# Start background processes
 make watch_frontend &
-make watch_backend &
+FRONTEND_PID=$!
 
-trap 'kill $(jobs -p)' EXIT
-wait
+make watch_backend &
+BACKEND_PID=$!
+
+# Function for graceful shutdown
+cleanup() {
+    echo "Shutting down gracefully..."
+    kill -TERM $FRONTEND_PID $BACKEND_PID 2>/dev/null || true
+    wait $FRONTEND_PID $BACKEND_PID 2>/dev/null || true
+    echo "Shutdown complete"
+}
+
+# Set up trap for graceful shutdown
+trap cleanup EXIT INT TERM
+
+# Wait for background processes
+wait