added config file

config/default.json

+{
+  "dbConfig": {
+    "host": "mongodb://127.0.0.1"
+  },
+  "serverConfig": {
+    "port": 8080
+  }
+}
\ No newline at end of file

index.js

@@ -3,8 +3,10 @@
 var path = require('path');
 var http = require('http');
 
+var config = require('config');
+
 var oas3Tools = require('oas3-tools');
-var serverPort = 8080;
+var serverPort = config.get('serverConfig.port');
 
 // swaggerRouter configuration
 var options = {
@@ -23,7 +25,7 @@ http.createServer(app).listen(serverPort, function () {
 
 //Set up mongoose connection
 var mongoose = require('mongoose');
-var mongoDB = 'mongodb://127.0.0.1';
+var mongoDB = config.get('dbConfig.host');
 mongoose.connect(mongoDB, { useNewUrlParser: true, useUnifiedTopology: true });
 var db = mongoose.connection;
 db.on('error', console.error.bind(console, 'MongoDB connection error:'));

package.json

@@ -13,6 +13,7 @@
   "license": "Unlicense",
   "private": true,
   "dependencies": {
+    "config": "^3.3.1",
     "connect": "^3.2.0",
     "js-yaml": "^3.3.0",
     "mongoose": "^5.9.21",