Add ability to set a default post expiry (#321)

[akkoma] / priv / repo / migrations / 20191006123824_add_keys_column.exs

defmodule Pleroma.Repo.Migrations.AddKeysColumn do
  use Ecto.Migration

  def change do
    alter table("users") do
      add_if_not_exists(:keys, :text)
    end
  end
end