Create alternative homepage in hexo project?

[Richard]

I have inherited a hexo project. It has the following structure:

- /source

 - pricing

   - index.md

   - details.md (etc)

- /themes

 - /layout 

  - /_partial

    - header.ejs

  - index.ejs

  - layout.ejs

  - page.ejs

  - post.js

Currently if I go to `/` on the website it shows the content of `index.ejs`/. I want to create an alternative homepage (for the purposes of AB testing) that is displayed at `/alternative` and that shares most of its content with `index.ejs` (I'll use a partial shared between the new file and the old one, to follow DNR principles).

I've created `/themes/layout/alternative.ejs` as a starting point, but unsurprisingly if I go to `/alternative` it just 404s. I don't understand how to create a new page there that shares most of its content with `index.ejs`. Can anyone help?