feat: add diesel, but not works

__database/diesel/migrations/2021-02-12-145106_create_posts/down.sql

@@ -0,0 +1,4 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE posts
+
+

__database/diesel/migrations/2021-02-12-145106_create_posts/up.sql

@@ -0,0 +1,8 @@
+-- Your SQL goes here
+CREATE TABLE posts (
+  id INTEGER PRIMARY KEY,
+  title VARCHAR NOT NULL,
+  body TEXT NOT NULL,
+  published BOOLEAN NOT NULL DEFAULT 'f'
+)
+