refactor: using Zod to validate .env schema

packages/backend/src/env/index.ts

@@ -0,0 +1,18 @@
+import { z } from 'zod';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+const envSchema = z.object({
+    PORT: z
+        .string()
+        .refine(
+            (port) => parseInt(port) > 0 && parseInt(port) < 65536,
+            "Invalid port number"
+        ),
+    DATABASE_URL: z.string().min(10)
+});
+
+type Env = z.infer<typeof envSchema>;
+
+export const ENV: Env = envSchema.parse(process.env);

packages/backend/src/models/database.ts

@@ -1,11 +1,4 @@
-import 'dotenv/config';
 import { drizzle } from 'drizzle-orm/node-postgres';
-import { pgTable, text, uuid } from 'drizzle-orm/pg-core';
+import { ENV } from '../env';
-
-const DATABASE_URL = process.env.DATABASE_URL;
-if (!DATABASE_URL) {
-    throw new Error("DATABASE_URL is missing")
-}
-
-export const db = drizzle(DATABASE_URL);
 
+export const db = drizzle(ENV.DATABASE_URL);