feat: publish root Dockerfile to our image registry (#599)

scripts/publish-sandbox.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -euo pipefail
+
+# Ensure required environment variables are set
+if [ -z "${SANDBOX_IMAGE_REGISTRY}" ]; then
+  echo "Error: SANDBOX_IMAGE_REGISTRY environment variable is not set." >&2
+  exit 1
+fi
+
+if [ -z "${SANDBOX_IMAGE_NAME}" ]; then
+  echo "Error: SANDBOX_IMAGE_NAME environment variable is not set." >&2
+  exit 1
+fi
+
+if [ -z "${npm_package_version}" ]; then
+  echo "Error: npm_package_version environment variable is not set (should be run via npm)." >&2
+  exit 1
+fi
+
+IMAGE_URI="${SANDBOX_IMAGE_REGISTRY}/${SANDBOX_IMAGE_NAME}:${npm_package_version}"
+
+if [ -n "${DOCKER_DRY_RUN:-}" ]; then
+  echo "DRY RUN: Would execute: docker push \"${IMAGE_URI}\""
+else
+  echo "Executing: docker push \"${IMAGE_URI}\""
+  docker push "${IMAGE_URI}"
+fi