cli: Make koolbox self-aware

This patch adds a dummy koolbox command into the koolbox container. This
way one can use the exact same commands with a koolbox prefix inside and
outside of koolbox. This should help to simplify future tooling around
make files as well as instructions regarding using koolbox.

cli/Dockerfile

@@ -83,6 +83,9 @@ RUN dnf install -y \
       procps-ng \
     && dnf clean all
 
+# Make koolbox self-aware
+COPY koolbox.dummy /usr/local/bin/koolbox
+
 # External tools
 COPY --from=terraform /bin/terraform /usr/local/bin/terraform
 COPY --from=packer /bin/packer /usr/local/bin/packer

cli/koolbox.dummy

+#!/bin/sh
+
+exec $@