fix: improve DATABASE_URL validation in web environment schema

apps/web/src/lib/env/web.ts

@@ -11,10 +11,11 @@ const webEnvSchema = z.object({
 	NEXT_PUBLIC_MARBLE_API_URL: z.url(),
 
 	// Server
-	DATABASE_URL: z
-		.string()
-		.startsWith("postgres://")
-		.or(z.string().startsWith("postgresql://")),
+	DATABASE_URL: z.string().refine(
+		(url) =>
+			url.startsWith("postgres://") || url.startsWith("postgresql://"),
+		"DATABASE_URL must be a postgres:// or postgresql:// URL",
+	),
 
 	BETTER_AUTH_SECRET: z.string(),
 	UPSTASH_REDIS_REST_URL: z.url(),