Add cors middleware to all endpoints

[armanbilge]

I'm assuming this is just an oversight? Or if there is a reason for this, apologies.

If this could be fixed in production, would be a big help for typelevel/cats#3972.

Thanks in advance!

[znarf]

If the goal is to add it everywhere, there should be a single call.

app.use(cors())

Not sure if it's the correct syntax.

[armanbilge]

Good point, I'll look into this.

[armanbilge]

@znarf fixed, you were exactly right.