🚀 Feature

A site can be versioned. In such case it's likely we want to use an Algolia DocSearch facet filter so that we don't end up with duplicate results:

    algolia: {
      apiKey: 'x',
      indexName: 'y',
      searchParameters: {
        facetFilters: [`version:${versions[0]}`],
      },
    },

This works, but also has some drawbacks: if you are currently browsing v1, and last version is v2, when you search, you will find v2 results.

We should make this facetting behavior contextual/dynamic, instead of being hardcoded in the site config, and if user is currently browsing v1, we should facet on v1, show him v1 related results.

Note: the solution must play well with docs multi-instance support. If you have:

• Android SDK in version v1, v2, v3
• iOS SDK in version v4, v5, v6

What should happen if:

• you type some Android related keyword while you are browsing iOS doc?
• you are not browsing any doc at all (ie you are on the homepage, the blog?)