Update file .env.sample

analytics-engine/.env.sample

-DYNACONF_SQLALCHEMY_DATABASE_URI=postgresql://postgres:CHANGE_ME@database/analytics-engine
-DYNACONF_CELERY_BROKER_URL=redis://:CHANGE_ME@redis_db:6379/0
-DYNACONF_CELERY_RESULT_BACKEND=redis://:CHANGE_ME@redis_db:6379/1
-DYNACONF_ANALYTICS_BACKEND_URL=http://scheduler:5000
-DYNACONF_RIGHTS_ENGINE_BACKEND_URL=http://localhost:80/
-WEBSITE=analytics
-URL=$DEPLOYMENT_URL
+DYNACONF_SQLALCHEMY_DATABASE_URI=postgresql://postgres:CHANGE_ME@database/analytics-engine # the password should match with POSTGRES_PASSWORD
+DYNACONF_CELERY_BROKER_URL=redis://:CHANGE_ME@redis_db:6379/0 # the password should match with the REDIS_PASSWORD
+DYNACONF_CELERY_RESULT_BACKEND=redis://:CHANGE_ME@redis_db:6379/1 # the password should match with the REDIS_PASSWORD
+DYNACONF_ANALYTICS_BACKEND_URL=http://scheduler:5000 # no changes needed
+DYNACONF_RIGHTS_ENGINE_BACKEND_URL=http://localhost:80/ # url of the rights engine
+WEBSITE=analytics # traefik configuration 
+URL=$DEPLOYMENT_URL # traefik configuration
 REDIS_PASSWORD=CHANGE_ME 
 POSTGRES_USER=postgres
 POSTGRES_DATABASE=analytics-engine