use ESM, add server setup, cleanup

Change-Id: Iafac35c2082523ae98c31017d9bad5c4d6e18ef3
diff --git a/package.json b/package.json
index 16825dd..75c81f2 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "jami-web-server",
+  "type": "module",
   "version": "1.0.0",
   "description": "Jaas Web API that handles client requests to Jami daemon",
   "main": "index.js",
@@ -29,7 +30,6 @@
     "jami-web-client": "file:client",
     "llnode": "^3.2.0",
     "nodemon": "^2.0.7",
-    "react-hot-loader": "^4.13.0",
     "webpack-dev-middleware": "^4.1.0",
     "webpack-hot-middleware": "^2.25.0"
   },