[create extension without superuser role](https://stackoverflow.com/questions/16527806/cannot-create-extension-without-superuser-role)
[potential problem if it's not working](https://stackoverflow.com/questions/39556719/django-test-error-creating-the-test-database-permission-denied-to-copy-databas)
createdb template_postgis; # create a new database
psql -U postgres -c "UPDATE pg_database SET datistemplate = TRUE WHERE datname = 'template_postgis';" # make it a template psql -U postpsql -U postgres -d template_postgis -c "CREATE EXTENSION postgis;" # install postgis in it