How to load and save documents using FaissStore from Langchain in the Next.js pages/api ???

Question

Trying to run  node pages/api/indexes.js  but it does nothing, it doesn't even give me an error... it is suppose to create 2 documents but I can't see them anywhere...I might be calling the wrong path from the new TextLoader??  const loader = new TextLoader("./restaurant.txt");   <-- the restaurant.txt is under pages/apiWhat would be wrong that this code doesn't do anything when I call it?Complete code here:const { OpenAIEmbeddings } = require("langchain/embeddings/openai");
const { FaissStore } = require("langchain/vectorstores/faiss");
const { CharacterTextSplitter } = require("langchain/text_splitter");
const { TextLoader } = require("langchain/document_loaders/fs/text");

const indexes = async (req, res) => {
  const loader = new TextLoader("./restaurant.txt"); /// <--- this is the call to the file 
  console.log(loader);
  const docs = await loader.load();
  const splitter = new CharacterTextSplitter({
    chunkSize: 200,
    chunkOverlap: 50,
  });
  const documents = await splitter.splitDocuments(docs);
  console.log(documents);

const embeddings = new OpenAIEmbeddings();
  const vectorStore = await FaissStore.fromDocuments(documents, embeddings);
  await vectorStore.save("./");  /// <--  here is where it should be saving 2 other files, but I can't find them anywhere.

res.status(200).json({ ok: ok });
};

module.exports = { indexes };

How to load and save documents using FaissStore from Langchain in the Next.js pages/api ???

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