This docker-compose.override.yml file produces error when rendering markdown files

[gschmutz]

x-dlt-env: &dlt-env
  DESTINATION__FILESYSTEM__BUCKET_URL: "s3://flight-dlt-bucket"
  RUNTIME__LOG_LEVEL: "INFO"
  DESTINATION__FILESYSTEM__CREDENTIALS__AWS_ACCESS_KEY_ID: "admin"
  DESTINATION__FILESYSTEM__CREDENTIALS__AWS_SECRET_ACCESS_KEY: "abc123abc123!"
  DESTINATION__FILESYSTEM__CREDENTIALS__ENDPOINT_URL: "http://rustfs-1:9000"
  DESTINATION__FILESYSTEM__CREDENTIALS__REGION_NAME: "us-east-1"

services:
  airflow-apiserver:
    environment:
      <<: *dlt-env
  airflow-dag-processor:
    environment:
      <<: *dlt-env
  airflow-scheduler:
    environment:
      <<: *dlt-env
  airflow-init:
    environment:
      <<: *dlt-env

Markdown Renderer produces these errors:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/jinja2cli/cli.py", line 288, in cli
    data = fn(data) or {}
  File "/usr/local/lib/python3.8/site-packages/jinja2cli/cli.py", line 141, in yaml_loader
    return load(stream, Loader=SafeLoader)
  File "/usr/local/lib/python3.8/site-packages/yaml/__init__.py", line 81, in load
    return loader.get_single_data()
  File "/usr/local/lib/python3.8/site-packages/yaml/constructor.py", line 49, in get_single_data
    node = self.get_single_node()
  File "yaml/_yaml.pyx", line 673, in yaml._yaml.CParser.get_single_node
  File "yaml/_yaml.pyx", line 687, in yaml._yaml.CParser._compose_document
  File "yaml/_yaml.pyx", line 731, in yaml._yaml.CParser._compose_node
  File "yaml/_yaml.pyx", line 845, in yaml._yaml.CParser._compose_mapping_node
  File "yaml/_yaml.pyx", line 731, in yaml._yaml.CParser._compose_node
  File "yaml/_yaml.pyx", line 845, in yaml._yaml.CParser._compose_mapping_node
  File "yaml/_yaml.pyx", line 731, in yaml._yaml.CParser._compose_node
  File "yaml/_yaml.pyx", line 845, in yaml._yaml.CParser._compose_mapping_node
  File "yaml/_yaml.pyx", line 731, in yaml._yaml.CParser._compose_node
  File "yaml/_yaml.pyx", line 845, in yaml._yaml.CParser._compose_mapping_node
  File "yaml/_yaml.pyx", line 703, in yaml._yaml.CParser._compose_node
yaml.composer.ComposerError: found undefined alias
  in "<unicode string>", line 526, column 11

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/jinja2", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.8/site-packages/jinja2cli/cli.py", line 433, in main
    sys.exit(cli(opts, args))
  File "/usr/local/lib/python3.8/site-packages/jinja2cli/cli.py", line 290, in cli
    raise raise_exc(u"%s ..." % data[:60])
jinja2cli.cli.MalformedYAML: networks:
  default:
    name: bigdata-minio-platform
servic ...