lots of things done: thread - reply - category - seeds

priv/repo/migrations/20180103040352_create_reply.exs

@@ -0,0 +1,14 @@
+defmodule MyApp.Repo.Migrations.CreateReply do
+  use Ecto.Migration
+
+  def change do
+    create table(:reply) do
+      add :user_id, references(:user)
+      add :thread_id, references(:thread)
+      add :content, :string
+      add :edited, :boolean
+      add :quote, :boolean
+      timestamps()
+    end
+  end
+end