fix: #25 dependencies and feat: #10 redirect to current song

[42Willow]

PR #16 works fine locally but doesn't work on Vercel.

Adding this:
vercel.json

{
    "routes": [{
        "src": "/api/(.*)",
        "dest": "api/index.py"
    }]
}

fixed the issue

Working deployment: https://spotify-readme-8i1rak5nw-42willows.vercel.app/api

---

I'm not sure if I should lock the dependencies, it's probably good practice to

[vercel]

@42Willow is attempting to deploy a commit to the tthn0's projects Team on Vercel.

A member of the Team first needs to authorize it.

[42Willow]

@dedomil

[dedomil]

This looks better, will close my pull request as this one works as expected!

[tthn0]

The outdated dependencies and #10 will be addressed in the next commit.