Added ability to deploy on Heroku

README.md

@@ -33,3 +33,16 @@ make sure admin access
 - to start server
 
 "C:\Program Files\MongoDB\Server\4.4\bin\mongo.exe"
+
+## Deploy
+
+### Heroku
+
+1. Fork this repository
+1. Create a free Heroku Account
+1. Create free heroku app with your github fork
+
+## Roadmap
+
+- A login Screen
+- protected routes with JWT

package.json

@@ -4,6 +4,7 @@
   "description": "A url shortner",
   "main": "index.js",
   "scripts": {
+    "start": "node ./server.js",
     "devStart": "nodemon server.js"
   },
   "repository": {

server.js

@@ -12,7 +12,9 @@ app.use(express.urlencoded({ extended: false }));
 
 // to connect to database
 const mongoose = require("mongoose");
-mongoose.connect("mongodb://localhost/db", {
+
+//App deploy or localhost mode connection to MongoDB
+mongoose.connect(process.env.MONGO_URL || "mongodb://localhost/db", {
   useNewUrlParser: true,
   useUnifiedTopology: true,
 });
@@ -46,7 +48,8 @@ app.get("/:shortUrl", async (req, res) => {
   //otherwise increase the click
   shortUrl.clicks++;
   //save the changes in table
-  shortUrl.save();
+  //can use `await` here but speed of redirect is more important
+  await shortUrl.save();
 
   //redirect the full link corresponding the short url we found
   res.redirect(shortUrl.full);