feat: initial commit

cmd/migrate/migrations/000002_posts_create.up.sql

@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS posts (
+    id bigserial PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    content TEXT NOT NULL,
+    user_id bigint NOT NULL,
+    created_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    updated_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+);