fix: add swarm-monitor binary and netcat to Dockerfile

Dockerfile

@@ -12,6 +12,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -o /usr/local/bin/query-api ./cmd/query-ap
 RUN CGO_ENABLED=0 GOOS=linux go build -o /usr/local/bin/web-ui ./cmd/web-ui
 RUN CGO_ENABLED=0 GOOS=linux go build -o /usr/local/bin/event-processor ./cmd/event-processor
 RUN CGO_ENABLED=0 GOOS=linux go build -o /usr/local/bin/openclaw-monitor ./cmd/openclaw-monitor
+RUN CGO_ENABLED=0 GOOS=linux go build -o /usr/local/bin/swarm-monitor ./cmd/swarm-monitor
 
 FROM debian:bookworm-slim
 
@@ -19,6 +20,7 @@ RUN apt-get update && apt-get install -y \
     ca-certificates \
     libvirt-clients \
     openssh-client \
+    netcat-openbsd \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app