Redis Client in NodeJs

Question

I have just started to learn redis, and want to implement it in my nodejs/express project.

I understand, that you must first make a client and then connect the client to a redis server. The code below is what is on the redis npm package (changed slightly so it better displays what I am doing):

(async () => {
  const client = redis.createClient();

  client.on('error', (err) => console.log('Redis Client Error', err));
  await client.connect();
  app.post('/redis-post', async (req, res) => {
    const {key, value} = req.body;
    let response = await client.set(key, value);
    res.status(200).json(response);
  });
})();

However, from this code it seems as if it creates a new client for every request. I don't know much about redis, but I feel as though I am missing or misunderstood something, since connecting to the redis server on a per request basis seems inefficient.

Could someone let me know if what I assumed about creating a client per request was right, and whether or not there is a better way to implement redis in node. (If so, any examples would be appreciated!)