Potential fix for code scanning alert no. 10: Uncontrolled data used in path expression

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: piquark6046

builder/source/cache.ts

@@ -1,10 +1,14 @@
 import * as Zod from 'zod'
 import * as Fs from 'node:fs'
 import * as Process from 'node:process'
+import * as Path from 'node:path'
 import { FetchAdShieldDomains } from './references/index.js'
 
-const CachePath = (Process.env.INIT_CWD ? Process.env.INIT_CWD : Process.cwd()) + '/.buildcache'
-const CacheDomainsPath = CachePath + '/domains.json'
+const BaseCacheDir = (Process.env.INIT_CWD && Path.isAbsolute(Process.env.INIT_CWD))
+  ? Process.env.INIT_CWD
+  : Process.cwd()
+const CachePath = Path.join(Path.resolve(BaseCacheDir), '.buildcache')
+const CacheDomainsPath = Path.join(CachePath, 'domains.json')
 
 export function CreateCache(Domains: Set<string>) {
   if (!Fs.existsSync(CachePath)) {