Dump existing data:
python3 manage.py dumpdata > datadump.json
Change settings.py to Postgres backend.
Make sure you can connect on PostgreSQL. Then:
| # Backup | |
| docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql | |
| # Restore | |
| cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE | |