[jjo] apb-docker-run.sh: support $KUBECONFIG, fixes #287 (#288)

scripts/apb-docker-run.sh

@@ -15,6 +15,8 @@ if ! [[ -z "${DOCKER_CERT_PATH}" ]] && [[ ${DOCKER_CERT_PATH} = *"minishift"* ]]
   echo "Targetting minishift host: ${DOCKER_HOST}"
 fi
 
+KUBECONFIG_ENV="${KUBECONFIG:+-v ${KUBECONFIG}:${KUBECONFIG} -e KUBECONFIG=${KUBECONFIG}}"
+
 if [[ $IS_MINISHIFT = true ]]; then
   # If targetting minishift, there are some unique issues with using the apb
   # container. Need to capture the minishift docker-env vars, unset them for the
@@ -40,10 +42,12 @@ if [[ $IS_MINISHIFT = true ]]; then
     -e DOCKER_HOST="${MINISHIFT_DOCKER_HOST}" \
     -e DOCKER_CERT_PATH="${MINISHIFT_DOCKER_CERT_DEST}" \
     -e MINISHIFT_REGISTRY=$(minishift openshift registry) \
+    ${KUBECONFIG_ENV} \
     -u $UID $APB_IMAGE "$@"
 else
   docker run --rm --privileged \
     -v $PWD:/mnt -v $HOME/.kube:/.kube \
     -v /var/run/docker.sock:/var/run/docker.sock \
+    ${KUBECONFIG_ENV} \
     -u $UID $APB_IMAGE "$@"
 fi