Add tcpdump

Author: logan2211

Dockerfile

@@ -32,5 +32,5 @@ COPY --from=builder /output/bin/* /usr/local/bin/
 
 RUN apt-get update && \
     apt-get install -y hping3 iperf3 iproute2 iptables \
-    iputils-ping iputils-tracepath mtr-tiny nftables procps traceroute \
-    whois && rm -rf /var/lib/apt/lists/* /var/log/*
+    iputils-ping iputils-tracepath mtr-tiny nftables procps tcpdump \
+    traceroute whois && rm -rf /var/lib/apt/lists/* /var/log/*