Improve errors and description of the Zod object responsible for parsing the Supabase keys.

packages/supabase/src/get-supabase-client-keys.ts

@@ -6,8 +6,16 @@ import { z } from 'zod';
 export function getSupabaseClientKeys() {
   return z
     .object({
-      url: z.string().min(1),
-      anonKey: z.string().min(1),
+      url: z.string({
+        description: `This is the URL of your hosted Supabase instance. Please provide the variable NEXT_PUBLIC_SUPABASE_URL.`,
+        required_error: `Please provide the variable NEXT_PUBLIC_SUPABASE_URL`,
+      }),
+      anonKey: z
+        .string({
+          description: `This is the anon key provided by Supabase. It is a public key used client-side. Please provide the variable NEXT_PUBLIC_SUPABASE_ANON_KEY.`,
+          required_error: `Please provide the variable NEXT_PUBLIC_SUPABASE_ANON_KEY`,
+        })
+        .min(1),
     })
     .parse({
       url: process.env.NEXT_PUBLIC_SUPABASE_URL,