fernet config

dockers/docker-compose.yaml

@@ -52,7 +52,7 @@ x-airflow-common:
     AIRFLOW__CORE__SQL_ALCHEMY_CONN: postgresql+psycopg2://airflow:airflow@postgres/airflow
     AIRFLOW__CELERY__RESULT_BACKEND: db+postgresql://airflow:airflow@postgres/airflow
     AIRFLOW__CELERY__BROKER_URL: redis://:@redis:6379/0
-    AIRFLOW__CORE__FERNET_KEY: ''
+    AIRFLOW__CORE__FERNET_KEY: ${AIRFLOW_FERNET_KEY:-}
     AIRFLOW__CORE__DAGS_ARE_PAUSED_AT_CREATION: 'true'
     AIRFLOW__CORE__LOAD_EXAMPLES: 'false'
     AIRFLOW__API__AUTH_BACKEND: 'airflow.api.auth.backend.basic_auth'