Add custom domain support for pwn.pp.ua

- Add CNAME file for custom domain
- Update VuePress config for custom domain deployment

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: PwnTips

docs/.vuepress/config.js

@@ -5,7 +5,7 @@ import { viteBundler } from '@vuepress/bundler-vite'
 export default defineUserConfig({
   title: 'PWN-Tips',
   description: '一些笔记',
-  base: '/', // Root path for user/organization GitHub Pages
+  base: '/', // Root path for custom domain
   bundler: viteBundler(),
   theme: defaultTheme({
     navbar: [],

docs/.vuepress/public/CNAME

@@ -0,0 +1 @@
+pwn.pp.ua