initial schema setup

backend/.gitignore

@@ -1,2 +1,3 @@
 node_modules/
 .env
+drizzle/

backend/src/db/schema.ts

@@ -0,0 +1,9 @@
+import { integer, pgTable, varchar } from "drizzle-orm/pg-core";
+
+export const usersTable = pgTable("users", {
+  id: integer().primaryKey().generatedAlwaysAsIdentity(),
+  name: varchar({ length: 255 }).notNull(),
+  age: integer().notNull(),
+  email: varchar({ length: 255 }).notNull().unique(),
+});
+