Add routePrefix documentation (update host.json sample in wiki)

Thank you for 0.7 new release with custom routes ✨

One of the new features is :

allow for the default “api” route prefix to be customized or completely removed via host.json

Please update host.json sample in wiki with :

{
    "http": {
        // The default value is "api".  An empty string will completely remove the prefix.
        "routePrefix": "api"
    }
}

Sources :

• Sample: https://github.com/Azure/azure-webjobs-sdk-script/blob/dev/sample/host.json
• Empty string: https://github.com/Azure/azure-webjobs-sdk-script/issues/373#issuecomment-255604004

[mathewc]

I’ve created a wiki page here, and I also updated the host.json wiki page.

[mathewc]

I’m planning on writing up some detailed instructions for http in general in our wiki. I’ll address this as well when I do that.

There are some other host level knobs that we’ve added recently that aren’t included in our existing host.json/function.json doc. I’ll work to address those as well.