how to install from private PyPI server.

[bzd111]

I want to install a package from my PyPI server, but I have noticed that the code only searches for packages on https://pypi.org/simple/. I suggest that we configure the index_urls and trusted-host settings in the pyproject.toml file, for example:

[config.rye.pip]
index-urls=["http://192.168.x.x:3141/root/dev/+simple/"]
trusted-hosts=["192.168.x.x"]

[mitsuhiko]

Relates to #36

[mitsuhiko]

This is resolved now.