fix default image repo

quickstart/docker/pushLatestDocker.sh

@@ -1,17 +1,21 @@
 #!/usr/bin/env bash
-set -eo pipefail
+
+set -o errexit
+set -o nounset
+set -o pipefail
+# set -o xtrace
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
-: "${ZITI_QUICKSTART_IMAGE:-openziti/quickstart}"
+: "${ZITI_QUICKSTART_IMAGE:=openziti/quickstart}"
 
-if [ -z "${ZITI_VERSION}" ]; then
+if [ -z "${ZITI_VERSION:-}" ]; then
   DOCKER_IMAGE_ROOT="$(realpath ${SCRIPT_DIR}/image)"
   v=$(source "${DOCKER_IMAGE_ROOT}/ziti-cli-functions.sh"; getLatestZitiVersion > /dev/null 2>&1; echo ${ZITI_BINARIES_VERSION})
   ZITI_VERSION=$(echo "${v}" | sed -e 's/^v//')
   echo "ZITI_VERSION=${ZITI_VERSION}"
 fi
 
-if [ -z "${ZITI_VERSION}" ]; then
+if [ -z "${ZITI_VERSION:-}" ]; then
   echo "ZITI_VERSION was not set and auto-detection failed."
   exit 1
 fi
@@ -22,7 +26,7 @@ if [ -z "${IMAGE_TAG}" ]; then
   echo "image tag name was not provided, using default '${IMAGE_TAG}'"
 fi
 
-if [ "local" == "${1}" ]; then
+if [ "local" == "${1-}" ]; then
   echo "LOADING LOCALLY instead of pushing to dockerhub"
   _BUILDX_PLATFORM=""
   _BUILDX_ACTION="--load"