Fix post v9 (meilisearch#206)

* Fix getting started button

* Add changes in yarn.lock

* Fix index UID naming error

* Rename identifier into primaryKey

* Update settings parts

* Fix on identifier

* Minor spelling fix

Improved contributing (meilisearch#204)

* Improved contributing

* Improved contributing

* Improved contributing

Merge pull request meilisearch#14 from meilisearch/change_create_indexes

Changed indexes creation to new doc version

Merge branch 'addValueExampleInIndexesDoc' into 'master'

Add indexed to id in schema example indexes

See merge request meilisearch/public/documentation!1

Add a favicon to the documentation page