Doesn't respond to HEAD requests
Nitter doesn't appear to respond to HEAD requests. I have a small URL handler wrapper script that performs HTTP HEAD requests to URLs to check whether they are still available (e.g. return a 404 or 5xx error code) before attempting to open them in either a dedicated application capable of playing back media (based on the returned Content-Type header) or opening it in a browser.

[The script in question](https://github.com/FichteFoll/dotfiles/tree/193c19de83528afa6b7aefd15a460e39e5defd60/openurl).

The following tweet can, for example, be opened by `mpv`.

```
$ curl -I https://nitter.ca/elonmusk/status/1547093032301985794
HTTP/2 404
server: nginx/1.18.0 (Ubuntu)
date: Thu, 21 Jul 2022 21:11:53 GMT
content-type: text/html;charset=utf-8
content-length: 3220
```