No Hello World: better intro docs.

[EvanCarroll]

Totally new to Zola. I use the Borland/386/blue theme for everything. I love that you already did this work. However,

Following the zola tutorial, I can get to zola serve, when I add

themes = "zola.386"

to my config.toml, and add the submodule I'm getting

Error: Failed to serve the site
Error: Failed to render section '/home/ecarroll/website/zola/content/_index.md'
Error: Reason: Failed to render 'index.html'
Error: Reason: Variable `config.extra.keywords` not found in context while rendering 'index.html'

This is a bit obtuse. Not sure what the problem is.

[EvanCarroll]

Apparently this is caused because I don't have an argument in my config.toml for config.extra.keywords which is undocumented.

In the repo it's set to,

keywords = "zola, theme, retro, hacking"

This is required by ./themes/zola.386/templates/index.html which has

<meta name="keywords" itemprop="keywords" content="{{ config.extra.keywords }}">

These seem to be present since first commit but that they're required is undocumented.