Refactor artifacts to use relative directory for build step and retrieval

src/functions/server/handle-hmr.ts

@@ -1,3 +1,5 @@
+import grabRelativePath from "../../utils/grab-relative-path";
+
 type Params = {
     req: Request;
 };
@@ -29,7 +31,7 @@ export default async function ({ req }: Params): Promise<Response> {
     const match = global.BUNEXT_ROUTER.match(referer_url.pathname);
 
     const target_map = match?.filePath
-        ? global.BUNEXT_BUNDLER_CTX_MAP?.[match.filePath]
+        ? global.BUNEXT_BUNDLER_CTX_MAP?.[grabRelativePath(match.filePath)]
         : undefined;
 
     let controller: ReadableStreamDefaultController<string>;