---
title: v0.4.2
description: "Per-subdomain base URL override"
date: 2026-02-27
tags:
- improvement
---

## Configuration

- Added `subdomain_base_url` field on collections: explicit URL override for subdomain deploys (e.g., `subdomain_base_url = "https://docs.example.com"` avoids the `www` prefix issue when `base_url` is `https://www.example.com`)

## Developer Experience

- Dev server preview hints now show the resolved subdomain URL (including explicit overrides)
- Validation rejects `subdomain_base_url` without `subdomain` and non-HTTP URLs
