Make command for clearing existing database

[krzysztofwolski]

The problem I would like to solve:

When working on multiple dev branches, sometimes I end up with database with broken migrations. There's README entry for situations like this, but it might be a good idea to add cleanup command to Makefile

Solution

• add cleanup command (https://github.com/saleor/saleor-platform#issues-with-migrations-after-changing-the-versions---resetting-the-database)
• due to the destructive nature of this command, the user should be presented with a warning and confirmation (with default set to abort the operation)

Extra points

It seems to be a common issue for casual/new platform users - sometimes, database just doesn't populate after some experiments. If the makefile command bootstrap could inform users about possible causes, it would help a lot.

Example:

• run bootstrap command
• migration command fails
• user is presented with the message explaining what could be a cause and suggesting cleanup as one of the solutions