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We just installed all of our project dependencies.

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We're now going to start up our code editor inside this track server directory and start up a tiny little

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express application.

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So let's get started.

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I'll start my code editor and then inside of my root project directory I'm going to first begin by making

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a new folder to house all my source code.

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I'm going to call this folder source and then inside there I'm going to make the root file for my entire

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project so I'll make a new file called index Dot.

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J.S. then inside of here we're going to write out the bare minimum amount of code to create a express

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application.

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We're gonna create one existing route or one single route and then make sure that our Express server

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listens to some port on our local machine will then use our Web browser to test out that little test

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route and make sure that we can get some content to appear.

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So inside of here I'm going to first begin by creating an express application so I'm going to import

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the Express library or required in I'll then create an app object like so.

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So this app object right here represents our entire application and we can associate some different

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root handlers with it.

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We'll now setup our first root handler right after the app declaration.

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So to do so I'll say app dot get forward slash and I'll pass in a function as the second argument like

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I said I'm going to generally assume that you are familiar with the express but just as a quick reminder

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of what's going on here we're seeing anytime someone makes a get type each TTP request to the root root

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of our application we want to run this function the function gets called automatically with a request

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object or an object that represents the incoming H TTP request and a rez object which represents the

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outgoing response so in this case we'll just send back a little bit of plain text to ever made this

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request.

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So I'll say red dot sent and I'll say something like Hi there.

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Like so now anytime someone makes a request to our route route we're gonna send back the plain text

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of Hi there.

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Now to actually get this working we're gonna have our app object where our Express application listen

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to a certain port on our local machine.

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So I'll say app dot listen three thousand I'll pass in a callback function as the second argument and

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inside here will say console log listening on port three thousand and that's all we need to get started.

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So going to save this file and then we'll try running it from our terminal.

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It's gonna flip over my terminal and I'll do node source index dot J.S..

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Now of course if you're on Windows you're gonna have a slightly different path separator right there.

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Just be aware so right away I'll see listing on port three thousand if you see an error message at this

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point in time 100 percent likely that you have another process already running on port three thousand.

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So just like we saw earlier on inside this course if you want to you can change the port right there

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from 3000 to say three thousand one.

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Or alternatively you could go find that other process and terminate it and then try running node source

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index dot J.S. once again it's now that our server is listening to port three.

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We can test out that route route just make sure everything is working as expected.

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So to test it out I'm going to open up my browser and navigate to local host colon 3000 like so and

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then once there I should see hi there on the screen.

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Very good.

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All right.

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So now that we've got some of the basics put together here let's come back the next video we're gonna

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start to wire up Mongo DB to our Express application so we can store some amount of data.