Change search to be portable

[teamcrisis]

Should search be changed to use portable where ?
https://gohugo.io/functions/where/#mainsections

I was trying to index more than just the docs section. Changing to portable would allow the user to specify which sections they would want indexed within the config.

Updating:
https://github.com/h-enk/doks/blob/master/assets/js/index.js#L86

To:
{{ $pages := where site.RegularPages "Type" "in" site.Params.mainSections }}

Then adding this to config.toml:

[params]
  mainSections = ["blog", "docs"]

[h-enk]

See also: #120, #130

[dacort]

Thanks for the sample code @teamcrisis - I agree this would be really useful. I'm using doks as a site for my personal projects, so also added that as a custom archetype and needed to search across it.