Run DB migrations on startup

assets/migrations/01 create node.sql

@@ -0,0 +1,6 @@
+create table node (
+	id INT PRIMARY KEY,
+	title TEXT NOT NULL,
+	body TEXT NOT NULL
+);
+insert into node(title, body) values ("First post", "This is the beginning of a beautiful relationship.");

assets/migrations/2 create node_type.sql

@@ -0,0 +1,9 @@
+create table node_type (
+	id INT PRIMARY KEY,
+	name TEXT NOT NULL
+);
+
+insert into node_type(id, name) values (0, "Basic post");
+
+alter table node
+add column node_type_id INT NOT NULL references node_type(id) default 0;