create DB schema file

sql/schema.sql

@@ -0,0 +1,18 @@
+CREATE DATABASE IF NOT EXISTS bookmarks;
+
+USE "bookmarks";
+
+CREATE TABLE IF NOT EXISTS bookmarks (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    bookmark_id TEXT NOT NULL,
+    url TEXT NOT NULL,
+    title TEXT NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+/* add index for url */
+CREATE UNIQUE INDEX IF NOT EXISTS bookmarks_url_idx ON bookmarks (url);
+
+/* add index for bookmark_id */
+CREATE UNIQUE INDEX IF NOT EXISTS bookmarks_bookmark_id_idx ON bookmarks (bookmark_id);