NEW: Initial task mgmt (#4)

priv/repo/migrations/20200614031655_initial_tasks.exs

@@ -0,0 +1,15 @@
+defmodule Planner.Repo.Migrations.InitialTasks do
+  use Ecto.Migration
+
+  def change do
+    create table(:tasks, primary_key: false) do
+      add(:id, :binary_id, primary_key: true)
+      add(:value, :text, null: false)
+      add(:filed_at, :naive_datetime)
+      add(:finished_at, :naive_datetime)
+      add(:due_at, :naive_datetime)
+
+      timestamps()
+    end
+  end
+end