how to upload files to IPFS using nodejs

I've tried to upload files to ipfs. But it's not uploading in ipfs. I'm getting hash in return after uploading the file. But it's not accessible using https://ipfs.io/ipfs/+hash but I can access the file localhost:8080/ipfs/+hash.
What am I doing wrong? What do I upload files in https://ipfs.io/ipfs
here is my app.js:

const express = require("express");
const app = express();
const ipfsClient = require("ipfs-http-client");
const ipfs = new ipfsClient();
const expFileUpload = require("express-fileupload");
app.use(expFileUpload());

app.post("/upload", (req, res) => {
    let fileObj = {};
    if (req.files.inputFile) {
        const file = req.files.inputFile;
        const fileName = file.name;
        const filePath = __dirname + "/files/" + fileName;

        file.mv(filePath, async (err) => {
            if (err) {
                console.log("Error: failed to download file.");
                return res.status(500).send(err);
            }

            const fileHash = await addFile(fileName, filePath);
            console.log("File Hash received __>", fileHash);
            fs.unlink(filePath, (err) => {
                if (err) {
                    console.log("Error: Unable to delete file. ", err);
                }
            });
            fileObj = {
                file: file,
                name: fileName,
                path: filePath,
                hash: fileHash
            };
            res.render("transfer", { fileObj });
        });
    }
});


const addFile = async (fileName, filePath) => {
    const file = fs.readFileSync(filePath);
    const filesAdded = await ipfs.add({ path: fileName, content: file }, {
    progress: (len) => console.log("Uploading file..." + len)
  });
    console.log(filesAdded);
    const fileHash = filesAdded.cid.string;

    return fileHash;
};

app.listen(3000);

Need help. Thank you.