If you don't own a domain or host a website, set up a github account and use github pages to have a `.well-known/nostr.json` file with the content:

```json

{

"names": {

"astroc": "YOURNOSTRPUBKEY"

}

}

```

Then go to astral.ninja/anigma.io and fill the NIP-05 field with `astroc@.github.io`