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Next.js is developed by a company called Vercel,
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that also provides a platform where
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you can host your applications.
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You don't have to use Vercel of course,
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Next.js is open source,
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and you can run it on your own servers,
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or on other platforms if you wish.
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But Vercel is simple to use
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and has some great features.
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It's free for personal or non-commercial projects,
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or you can pay a monthly subscription
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for more serious projects.
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Take a look at the Pricing page for more details.
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If you sign up, you'll then see this dashboard,
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from where we can "Create a New Project".
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Now, for this we need a Git repository.
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And I already have one on Github
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for the next-reviews app,
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so this is what I'll use.
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For your own applications, you can connect with either Github,
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Gitlab, or BitBucket.
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Anyway, let's go and create a new project.
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The first time we'll need to
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connect our Github Account,
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and this will prompt us to install
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the Vercel integration
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into that Github account.
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We need to give Vercel access to our repositories,
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either all of them, or only selected ones.
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I will select only the "next-reviews" project,
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since that's what I want to deploy.
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Vercel needs access our code so
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that it can build our app.
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So let's install this Github application.
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I can now select my account from this list,
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and import the "next-reviews" project from Github.
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Here we can configure a few settings.
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Note that Vercel supports many
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different frameworks,
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not just Next.js,
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but it automatically detected
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which one we're using.
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We can also define Environment Variables,
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which can be useful to set database
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connection details for example.
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But we don't need any variables at the moment.
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So let's click "Deploy".
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It will take a minute or so
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to set up a new project.
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Ok, the build completed.
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And congratulations! Our project is now deployed.
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Let's continue to the dashboard.
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Here we can see more details about our project.
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It was automatically assigned
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a "vercel.app" subdomain.
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And if we open this URL,
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here's our website, deployed to production.
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Let's quickly check that all
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the pages are working.
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It looks fine.
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So our Reviews app is now visible to the public.
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And with a secure connection,
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because Vercel also provisioned
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a certificate for us.
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Now, for a real world application
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we'd probably want to configure
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a custom domain name,
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but for this example I'll just
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use the autogenerated one.
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Now, the best feature of the Vercel platform
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is that it does automated deployments by default.
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This means that, whenever we push
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any changes to our Git repository
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Vercel will automatically build and deploy
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a new version of our website.
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You can see that our first deployment
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was generated from the "main" branch
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at a specific Git commit.
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Let's see what happens if we modify our project.
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For example, we could simply change
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the footer in "layout.jsx".
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I'll edit this file directly here,
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just because it's quicker,
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but normally you'll want to test
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the changes locally first.
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Anyway, let's add some text to the footer,
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saying "Deployed on Vercel".
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We can now commit the changes
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straight from this page.
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Let me write "Deployed on Vercel" as the message,
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and let's commit this change
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directly to the main branch.
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If we go back to the project page,
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and look at the commits,
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note that there's a circle
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next to the latest commit.
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It's amber, meaning there's an action in progress.
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The previous commit shows a green tick,
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meaning that it was built successfully.
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In fact, if we go and look
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at the Vercel deployments,
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you can see that there's a new one building,
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and it was triggered by our latest commit.
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So Vercel is automatically building
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a new version of our application,
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to include the latest change.
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It's now ready.
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Which means that, if we go to our public website,
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and reload the page,
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it now shows "Deployed on Vercel" in the footer.
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Our change is already visible to all our users.
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All we need to do is push our code to Github,
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and Vercel will automatically
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deploy the latest version.
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Not only that, but if there's a problem
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with the latest deployment,
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we can perform a rollback simply
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by pushing this button.
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Also, in addition to production deployments,
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we can automatically deploy other Git branches.
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This way we can test changes
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in a separate environment,
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before merging them and deploying
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them to production.
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So, Vercel is a powerful platform
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for continuous deployments,
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and I definitely recommend giving it a try.
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