pullImage method
Pulls an image from a registry.
Sends POST /images/create with the image name and optional tag. If
image contains no : tag suffix, latest is assumed.
Implementation
Future<void> pullImage(String image) async {
final parts = image.split(':');
final fromImage = parts.first;
final tag = parts.length > 1 ? parts.last : 'latest';
final resp = await _request(
'POST',
'/images/create',
queryParams: {'fromImage': fromImage, 'tag': tag},
);
_throwIfError(resp);
}