Fix: index.htmlでロゴのパスが誤っている問題を修正 / New: ディレクトリを探す関数

packages/backend/src/lib/path.ts

@@ -0,0 +1,25 @@
+import { existsSync } from "node:fs";
+import { dirname, join } from "node:path";
+
+export function findDir(
+  targetPath: string,
+  cwd: string,
+): string {
+  let current = cwd;
+
+  while (true) {
+    const candidate = join(current, targetPath);
+
+    if (existsSync(candidate)) {
+      return candidate;
+    }
+
+    const parent = dirname(current);
+
+    if (parent === current) {
+      throw new Error(`Not found: ${targetPath}`);
+    }
+
+    current = parent;
+  }
+}