Fixes error when doing `mix ecto.create`
Fixes error when doing `mix ecto.create`

When creating database in freshly checked out project, following error
is generated.

$ mix ecto.create

warning: could not find repositories for application
:ex_admin_demo.

You can avoid this warning by passing the -r
flag or by setting the
repositories managed by this application in
your config/config.exs:

config :ex_admin_demo, ecto_repos:
[...]

The configuration may be an
empty list if it does not
define any
repo.

smpallen99/ex_admin_demo,smpallen99/ex_admin_demo