fix(Dockerfile): install iptables-legacy package

With Alpine 3.19 the iptables-legacy binary is provided by the iptables-legacy package.

And the ip6tables package is not needed anymore because it is provided by the iptables package.

Signed-off-by: elchenberg <elchenberg@users.noreply.github.com>

Dockerfile

@@ -16,7 +16,7 @@ FROM ${RUNTIME_BASE}
 
 RUN apk add --no-cache \
       iptables \
-      ip6tables \
+      iptables-legacy \
       ipset \
       iproute2 \
       ipvsadm \