Updated docs & deleted untracked files

.docker/.env

-# Example values to override for non-test deployments
-
-#BASE_URL=https://example.com
-#ADMIN_EMAIL=noreply@example.com
-#LOG_LEVEL=info
-#IDENTITY_SERVICE_ADMIN_PASSWORD=admin
-#AUTH_SERVICE_ADMIN_PASSWORD=admin
-#METADATA_DB_PASSWORD=dbrepo
-#DATA_DB_PASSWORD=dbrepo
-#AUTH_DB_PASSWORD=dbrepo
-#S3_ACCESS_KEY_ID=seaweedfsadmin
-#S3_SECRET_ACCESS_KEY=seaweedfsadmin
-#SYSTEM_PASSWORD=admin