diff --git a/b3-dev/node/session3/config.json/config.json b/b3-dev/node/session3/config.json/config.json
new file mode 100644
index 0000000..368b111
--- /dev/null
+++ b/b3-dev/node/session3/config.json/config.json
@@ -0,0 +1,24 @@
+{
+ "development": {
+ "config_id": "development",
+ "app_name": "conf-test",
+ "app_desc": "An app to test environnement variables",
+ "node_port": 3000,
+ "json_indentation": 4,
+ "database": "nodesandbox_env-dev"
+ },
+ "testing": {
+ "config_id": "testing",
+ "database": "nodesandbox_env-tst"
+ },
+ "staging": {
+ "config_id": "staging",
+ "node_port": 8080,
+ "database": "nodesandbox_env-stage"
+ },
+ "production": {
+ "config_id": "production",
+ "node_port": 8080,
+ "database": "nodesandbox_env"
+ }
+}
\ No newline at end of file
diff --git a/b3-dev/node/session3/config.json/server.js b/b3-dev/node/session3/config.json/server.js
new file mode 100644
index 0000000..0bceeae
--- /dev/null
+++ b/b3-dev/node/session3/config.json/server.js
@@ -0,0 +1,40 @@
+const http = require('http');
+const url = require('url');
+
+// load config file
+const config = require(process.cwd() + '/config.json');
+
+function outputHTML5(status, response, content, title)
+{
+ response.writeHead(status, { 'Content-Type': 'text/html; charset=utf-8' });
+ response.write(
+ `
+
+
+
+
+ ${title}
+
+
+
+ ${content}
+
+
+ `
+ );
+ response.end();
+}
+
+var server = http.createServer(function (request, response) {
+ if(request.url === "/") {
+
+ content = config.staging.config_id;
+
+ outputHTML5(200,response,content,"Server info");
+ }
+ else {
+ outputHTML5(404,response,'Y\'a rien ici',"Oups");
+ }
+});
+
+server.listen(80);