daemon help docs for CORS

[carver]

Convey the basic idea, plus an example. Don't encourage using *.

This would have saved me some code spelunking.

[GitCop]

There were the following issues with your Pull Request

• Commit: c4fb36b
  • Invalid signoff. Commit message must end with License: MIT
    Signed-off-by: .* <.*>

Guidelines are available to help. Your feedback on GitCop is welcome on this issue

---

This message was auto-generated by https://gitcop.com

[carver]

License: MIT is fine. Do I need to rewrite the commit and force-push?

[jbenet]

License: MIT is fine. Do I need to rewrite the commit and force-push?

yes please, see Guidelines

[whyrusleeping]

this is a feature i did not know we had. 👍

[jbenet]

LGTM 👍

@carver bonus points if you make an example for https://github.com/ipfs/examples

[carver]

unfortunately, although exporting this variable did stop the CORS errors, i am still getting a 403 Forbidden from the API server when trying to post some text.

i'm happy to add one to ipfs/examples, but i'll wait until i have the browserified version of ipfs-api working end to end.

i'm also working on node-ipfs-api, adding the CORS info to the readme, and maybe fixing a Buffer bug: Uncaught Error: File.contents can only be a Buffer, a Stream, or null.