update env variables to use zod

frontend/src/lib/db/index.ts

@@ -1,9 +1,7 @@
 import { drizzle } from 'drizzle-orm/postgres-js'
 import postgres from 'postgres'
 import * as schema from './schema'
+import { env } from '$lib/env'
 
-const client = postgres(
+const client = postgres(env.DATABASE_URL)
-	process.env.DATABASE_URL ??
-		'postgres://postgres:password@127.0.0.1:5432/link-shortener',
-)
 export const db = drizzle(client, { schema })

frontend/src/lib/db/migrate.ts

@@ -1,8 +1,9 @@
+import { env } from '$lib/env'
 import { drizzle } from 'drizzle-orm/postgres-js'
 import { migrate } from 'drizzle-orm/postgres-js/migrator'
 import postgres from 'postgres'
 
-const sql = postgres(Bun.env.DATABASE_URL ?? '', { max: 1 })
+const sql = postgres(env.DATABASE_URL, { max: 1 })
 const db = drizzle(sql)
 
 await migrate(db, { migrationsFolder: 'drizzle' })

frontend/src/lib/env.ts

@@ -0,0 +1,8 @@
+import { z } from 'zod'
+
+const envSchema = z.object({
+	DATABASE_URL: z.string().url(),
+	PUBLIC_SHORTENER_URL: z.string(),
+})
+
+export const env = envSchema.parse(process.env)

frontend/src/routes/api/shortener/[id]/qr/+server.ts

@@ -4,8 +4,9 @@ import { eq } from 'drizzle-orm'
 import type { RequestHandler } from './$types'
 import QRCode from 'qrcode'
 import { redirect } from '@sveltejs/kit'
+import { env } from '$lib/env'
 
-const shortenerUrl = Bun.env.PUBLIC_SHORTENER_URL ?? 'shortener.url'
+const shortenerUrl = env.PUBLIC_SHORTENER_URL
 
 export const GET: RequestHandler = async (event) => {
 	const shortenerId = event.params.id