initial migration

infrastructure/postgres/adding.md

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+Create a new role by executing the createuser command. With the options below, the new role will not be a superuser and will not have privileges for creating new databases or new roles (this is usually the default for the createuser command).
+
+k exec -it -n postgres postgres-postgresql-0 -- bash
+
+```
+createuser -U postgres USER_NAME -S -D -R -P
+```
+You will be prompted to enter first the password for the new role and to reenter it, and then to enter the postgres role password.
+
+Create a new database with the new role as the owner:
+```
+createdb -U postgres DATABASE_NAME  -O USER_NAME
+```