Add HTTPS when calling ipfs API

[Sh4d1]

Hey,

I saw that when NODE_ENV is set to production, even if the site is on https, the call is made over http. Thsi PR fixes it, taking the protocol of the site to send the requests.

See #625

[hacdias]

LGTM 😄 Thanks!

[daviddias]

@hacdias did you test this with localhost?

[hacdias]

@diasdavid yeah, it defaults to HTTP. Although, there could be a problem if someone used HTTPS on localhost. But that's a matter of removing the first condition.

[Sh4d1]

@diasdavid @hacdias also, I'm not sure it is a web UI issue though but it is not working.
I have a docker image of go-ipfs running on my server, and traefik as a reverse proxy. I expose the port 5001, and it is also accessible via HTTPS on ipfs.ptrk.io. When I try to load a request like API/v0/version, it loads the content but the request is not finished (still loading), same when I curl it. When I use the port 5001, it's all good. So on the WebUI, the requests made to https://ipfs.ptrk.io, are taking a long time, and when they are finished, nothing appears on the UI.

[Sh4d1]

I'm pretty sure it is linked to this