Updated controller logic and reworked unit testing

mongoConfig.js

@@ -0,0 +1,11 @@
+require('dotenv').config({ path: 'development.env' });
+
+const mongoose = require('mongoose'); //import mongoose
+
+mongoose.connect(
+    process.env.MONGODB_URI,
+    (err) => {
+        if (err) return console.log("Error: ", err);
+        console.log("MongoDB Connection -- Ready state is:", mongoose.connection.readyState);
+    }
+);