better config implementation from ENV or json file.

using new environment;
params passed as docker-compose params

package.json

@@ -4,7 +4,8 @@
   "description": " test api for IOT devices",
   "main": "index.js",
   "scripts": {
-    "dev": "nodemon dht.js",
+    "pm2": "pm2 start ecosystem.config.js --no-daemon",
+    "dev": "nodemon index.js",
     "start": "node index.js"
   },
   "repository": {
@@ -37,6 +38,7 @@
     "mongoose": "^5.9.19",
     "morgan": "^1.10.0",
     "mosca": "^2.8.3",
+    "jsonschema": "1.2.6",
     "mqtt": "^4.1.0",
     "mysql": "^2.18.1",
     "mysql2": "^2.1.0",