Fix README details (decidim#8760)

Author: andreslucena

README.adoc

@@ -1,5 +1,3 @@
-D:doctype: book
-
 image::https://cdn.rawgit.com/decidim/decidim/develop/logo.svg[Decidim Logo,400]
 
 The participatory democracy framework.

decidim-core/README.md

@@ -70,7 +70,7 @@ This can be done in an initializer (like user does), in a participatory_space ma
 
 ## Metrics docs
 
-Core adds an implementation to show APP metrics within some pages. You can see specific documentation at [Metrics](https://github.com/decidim/decidim/tree/develop/docs/advanced/metrics.md)
+Core adds an implementation to show APP metrics within some pages. You can see specific documentation at [Metrics](https://docs.decidim.org/en/develop/metrics/)
 
 ## Contributing
 

decidim-elections/README.md

@@ -8,7 +8,7 @@ The Elections module adds elections to any participatory space.
 
 Elections will be available as a Component for a Participatory Space.
 
-In order to celebrate [End-to-end auditable votings](https://en.wikipedia.org/wiki/End-to-end_auditable_voting_systems) using the Elections module, you will need to connect your Decidim instance with an instance of the [Decidim Bulletin Board application](https://github.com/decidim/decidim-bulletin-board/). To create this connection, please check the [instructions](https://github.com/decidim/decidim/blob/develop/docs/services/elections_bulletin_board.md).
+In order to celebrate [End-to-end auditable votings](https://en.wikipedia.org/wiki/End-to-end_auditable_voting_systems) using the Elections module, you will need to connect your Decidim instance with an instance of the [Decidim Bulletin Board application](https://github.com/decidim/decidim-bulletin-board/). To create this connection, please check the [instructions](https://docs.decidim.org/en/services/elections_bulletin_board/).
 
 ## Installation