For more details, check https://airflow.apache.org/docs/apache-airflow/stable/start/docker.html.
On Linux, you may need to add a file called .env with the following lines
AIRFLOW_UID=1001
AIRFLOW_GID=0
An AWS Redshift cluster is required for DAGs aws_s3_to_redshift and bicycle_sharing_example. One can simply make use of the script in data_warehouse_with_redshift to start a Redshift cluster.