Fixes for #16
Added local config files to gitignore, and added dev and test configuration to load local files
example dev.local.exs
use Mix.Config
config :grow_journal, GrowJournal.Repo,
adapter: Ecto.Adapters.Postgres,
username: "some_random_user",
password: "123456",
database: "grow_journal_dev",
hostname: "localhost",
pool_size: 10