Add white backgrounds to GPW preview scripts. #10849

	# Continuous Integration (CI)

	name: CI
	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- name: Set up Python 3.10
	uses: actions/setup-python@v5
	with:
	python-version: '3.10'
	- name: Install dependencies
	run: \|
	pip install absl-py
	- name: Debug Python environment
	run: \|
	pip list
	echo $PYTHONPATH
	python -c "import sys; print(sys.path)"
	- name: Cache bazel
	uses: actions/cache@v3
	env:
	cache-name: bazel-cache
	with:
	path: \|
	~/.cache/bazelisk
	~/.cache/bazel
	key: ${{ runner.os }}-${{ env.cache-name }}-${{ github.ref }}
	restore-keys: ${{ runner.os }}-${{ env.cache-name }}-development
	- uses: actions/checkout@v4
	- name: Build
	run: bazel build --define jsonnet_port=cpp //...
	- name: Test Checker
	run: bazel test --define jsonnet_port=cpp --test_output=errors //...
	- name: Checker
	run: bazel-bin/checker/ee_stac_check

Provide feedback