fix github pages path, and add doc links in readme

Author: JMLamodiere

README.md

@@ -1 +1,9 @@
-# tdd-demo-forumphp2020
+# TDD Demo - ForumPHP 2020
+
+Forum PHP 2020 talk (in French) : [Trop de mock tue le test : ce que l'archi hexagonale a changé](https://event.afup.org/forum-php-2020/programme-forum-php-2020/#3414)
+
+## API documentation
+
+- Local : [docs/openapi.yml](docs/openapi.yml)
+- Github Pages : https://jmlamodiere.github.io/tdd-demo-forumphp2020
+- Swaggger Hub : https://app.swaggerhub.com/apis/JMLamodiere/tdd-demo_forum_php_2020/1.0.0