feat: integrate Drizzle ORM and SQLite for authentication

server/db/schema.ts

@@ -0,0 +1,32 @@
+import { sqliteTable, text, integer, real } from 'drizzle-orm/sqlite-core';
+
+export const customers = sqliteTable('customers', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  name: text('name').notNull(),
+  gender: text('gender', { enum: ['male', 'female'] }).notNull(),
+  contact: text('contact').notNull().unique(),
+  idCard: text('id_card').notNull().unique(),
+  password: text('password').notNull(),
+});
+
+export const roomTypes = sqliteTable('room_types', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  typeName: text('type_name').notNull(),
+  starRating: integer('star_rating').notNull(),
+});
+
+export const rooms = sqliteTable('rooms', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  typeId: integer('type_id').notNull().references(() => roomTypes.id),
+  price: real('price').notNull(),
+  feature: text('feature'),
+  availableCount: integer('available_count').notNull().default(0),
+});
+
+export const reservations = sqliteTable('reservations', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  customerId: integer('customer_id').notNull().references(() => customers.id),
+  roomId: integer('room_id').notNull().references(() => rooms.id),
+  checkInTime: integer('check_in_time', { mode: 'timestamp' }).notNull(),
+  stayDays: integer('stay_days').notNull(),
+});