REST API upgrade

source/session_server/routes/index.js

@@ -0,0 +1,6 @@
+const router = require('express').Router()
+const router_session = require('./session')
+
+router.use('/session', router_session)
+
+module.exports = router

source/session_server/routes/session.js

@@ -0,0 +1,8 @@
+const router = require('express').Router()
+
+const {create_session, connect_session} = require('../controller/session')
+
+router.get('/create', create_session)
+router.get('/connect', connect_session)
+
+module.exports = router