diff --git a/README.md b/README.md
index cc2390c..b8b4bc2 100644
--- a/README.md
+++ b/README.md
@@ -1,52 +1,109 @@
 # interview-v2
 
-Fetch posts using a REST API.
+Simple REST API application based on Expressjs to fetch blog posts with custom endpoints and responses.
+
+### Installation (docker)
+
+~~~
+$ git clone
+$ cd interview-v2/
+$ docker-compose build
+~~~
 
 ### Installation
 
-...
+~~~
+$ npm install
+~~~
 
 ### Usage
 
-...
+Launch server
+
+~~~
+$ node index.js
+~~~
+
+Launch application with Docker
+
+~~~
+$ docker-compose up -d
+~~~
 
 ### API endpoints
 
-...
- 
+| Method / Route        | Resource           | Description  |
+| --------------------- | ------------------ | ------------ |
+| `GET` /posts      | Posts,Users | Fetch posts and their users |
+
+The `/posts` route can receive extra parameters :
+
+| Parameter        | Values/type           | Description  |
+| --------------------- | ------------------ | ------------ |
+| user_pos | eq,cancer,cap,arctic,antarctic | Search posts by user position |
+| user_id | *int* | Search posts by user id |
+
 ### Response
 
-Example response for posts
+The response follows the [Google JSON guide](https://google.github.io/styleguide/jsoncstyleguide.xml).
+
+**Success response return data**
 
 ```json
-[
-  {
-    "title": "<h1>title</h1>",
-    "body": "<p>body</p>",
-    "user": {
-      "id": 1,
-      "firstname": "Raphael",
-      "lastname": "Cerveaux",
-      "email": "raphael@crvx.fr",
-      "comments_count": 3,
-      "geopos": "latitude 23° 27' sud"
+{
+  "data": [
+    {
+        "id": 1001,
+        "name": "Wing"
     }
-  },
-  {
-    "title": "<h1>title2</h1>",
-    "body": "<p>body</p>",
-    "user": {
-      "id": 1,
-      "firstname": "Raphael",
-      "lastname": "Cerveaux",
-      "email": "raphael@crvx.fr",
-      "comments_count": 3,
-      "geopos": "latitude 23° 27' sud"
-    }
-  }
-]
+  ]
+}
 ```
 
+**Error response return error**
+
+```json
+{
+  "error": {
+    "code": 404,
+    "message": "ID not found"
+  }
+}
+```
+
+Here is an example response for `/posts` :
+
+```json
+{
+    "data": [
+        {
+            "id": 1,
+            "title": "<h1>sunt aut facere repellat provident occaecati excepturi optio reprehenderit</h1>",
+            "body": "<p>quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto</p>",
+            "user": {
+                "id": 1,
+                "firstname": "Raphael",
+                "lastname": "Cerveaux",
+                "email": "raphael@crvx.fr",
+                "comments_count": 3,
+                "pos": {
+                    "lat": "-37.3159",
+                    "lng": "81.1496"
+                }
+            }
+        }
+    ]
+}
+```
+
+### Architecture
+
+The application fetch resources from an external REST API and formats the response for the end user.
+
+![](https://i.imgur.com/vRJhQMP.png)
+
+The Docker configuration is composed of 2 layers. It uses a node image to launch the app and Nginx.
+
 -----
 
 ## Exercice
diff --git a/app.js b/index.js
similarity index 100%
rename from app.js
rename to index.js