Building a base image using envconsul

app-Dockerfile

FROM envconsul:latest

# how can i set the prefix here? preceding the cmd seems ugly
CMD ["my-command", "arg1", "argN"]

envconsul-Dockerfile

FROM base:latest
#
# install steps
#
ENTRYPOINT ["/path/to/envconsul"]

envconsul-launcher.sh

#!/bin/sh

if [ -z "$CONSUL" ]; then
  echo "WARNING! Consul not available, running locally."
  $@
else
  /usr/local/bin/envconsul \
    -config=/etc/envconsul.hcl \
    -consul=${CONSUL_SERVER}:8500 \
    -prefix=${CONSUL_PREFIX:-/} $@
fi

exit $?