added explict auth for mongoDB when used in prod

reference:
https://www.mongodb.com/docs/drivers/node/current/fundamentals/authentication/mechanisms/

lib/site-platform.js

@@ -34,7 +34,16 @@ module.connectDatabase = async (/*dtp*/) => {
       host: process.env.MONGODB_HOST,
       database: process.env.MONGODB_DATABASE,
     });
-    const mongoConnectUri = `mongodb://${process.env.MONGODB_HOST}/${process.env.MONGODB_DATABASE}`;
+    const mongoInfo = {
+      host: process.env.MONGODB_HOST,
+      db: process.env.MONGODB_DATABASE,
+      username: encodeURIComponent(process.env.MONGODB_USERNAME),
+      password: encodeURIComponent(process.env.MONGODB_PASSWORD),
+    }
+    let mongoConnectUri = `mongodb://${process.env.MONGODB_HOST}/${process.env.MONGODB_DATABASE}`;
+    if (process.env.NODE_ENV === 'production'){
+      mongoConnectUri = `mongodb://${mongoInfo.username}:${mongoInfo.password}@${mongoInfo.host}/${mongoInfo.db}`;
+    }
     module.db = await mongoose.connect(mongoConnectUri, {
       socketTimeoutMS: 0,
       keepAlive: true,