simplified regex
SUPPORTED_FILE_EXTENSIONS = [".tf", ".yml", ".yaml", ".json", ".template"]
ANY_VALUE = "CKV_ANY"
-DOCKER_IMAGE_REGEX = r'(?:[^\s\/]+/)?([^\s:]+)(?::)?([^\s]*)'
+DOCKER_IMAGE_REGEX = r'(?:[^\s\/]+/)?([^\s:]+):?([^\s]*)'
