Is it actually a problem to set your homepage on URL other than www.domain.com?
Just read this article saying :
I do not quite understand the logic behind it, is it actually a problem to set your homepage on URL other than www.domain.com?
Home Page Has a Single URL
If your domain is www.foo.com, then your home page should “live” at www.foo.com.
It shouldn’t be
or anything else. Those are all canonically different from www.foo.com. Make sure all links back to the home page are canonically correct.
Don’t depend on rel=canonical or 301 redirects for this. Make sure all internal site links point to the same canonical home page address. No site should ever require a 301 redirect from internal links to its own home page.