useful links:
- connect to openshifts database https://www.cnblogs.com/ibgo/p/4287448.html
- no such a table https://stackoverflow.com/questions/25771755/django-operationalerror-no-such-table/40769290 (67)
- reset migrations https://simpleisbetterthancomplex.com/tutorial/2016/07/26/how-to-reset-migrations.html