Add IP utilities for diagnostics

To help diagnose connectivity issues we intend to add diagnostics
functionality. We plan to use regular IP utilities for this, hence
add them to the base container. They might also be helpful when manually
debugging connectivity issues.

Dockerfile

@@ -17,6 +17,8 @@ RUN \
         libnl-route-3-200 \
         unzip \
         gdb \
+        iputils-ping \
+        iproute2 \
     && apt-get purge -y --auto-remove \
     && rm -rf \
         /var/lib/apt/lists/* \