Nodemon causes issue with running migrations

[bookcasey]

Found a strange bug today, if nodemon is running, the knex migrations will sometimes fail and output 'Already up to date' even if there are new migrations. Here is a StackOverflow threadabout the issue.

Two possible solutions: make it clear in the readme that the start:dev script can't be running while running the migrations, or add --ignore src/db/migrations to the start-dev script (or a nodemon.json file with the same option set).

[bookcasey]

#92