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The problem here is that,
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on the single meetup page,
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we do specify which meetup pages should be pre-generated,
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and we only set this at build time and never thereafter.
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And since we set fallback to false,
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we also ensure that any requests to meetups,
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for which no page was pre-generated before,
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will fail.
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Now that worked as long as we didn't add a new meetup,
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and it worked during development,
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because there the getStaticPaths function ran
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for every incoming request,
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but it now fails after deployment.
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Now fixing it is quite simple though, thankfully.
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We can set fallback to true, or even better, to 'blocking'.
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When you set fallback to true or to blocking,
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you're telling NextJS that the list of paths
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which you're specifying here, might not be exhaustive,
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there might be more valid pages.
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And, therefore, when fallback is set to true or to blocking,
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NextJS will not respond with a 404 page
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if it can't find the page immediately.
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Instead with fallback set to true or blocking,
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it will then generate that page on demand,
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and thereafter cache it,
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so it will pre-generate it when needed.
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Now the difference between true and blocking then is that,
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with true, it would immediately return an empty page,
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and then pull down the dynamically generated content
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once that's done.
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So you need to handle that case
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that the page does not have the data yet.
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With blocking, the user will not see anything until
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the page was pre-generated,
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and the finished page will be served.
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And that's the approach I will use here,
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since it doesn't require any other extra work from our side.
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So if we change fallback to blocking,
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we'll not face this problem anymore.
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Now we just need to redeploy this.
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And for this, all we have to do is create
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a new code snapshot with git add,
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and then with git commit,
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where we say, "fixed fallback", or something like this,
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and then simply push our branch again,
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push our repository back onto GitHub.
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And the great thing is that NextJS will actually watch
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this main branch to which we pushed,
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and whenever it detects a change there,
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it will automatically start building and redeploying.
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As you can see here, it's building already again.
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So that's very convenient.
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If you want to update your page and redeploy,
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all you have to do is create a new commit and push it
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to your connected GitHub repository,
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and that will then automatically trigger a redeployment.
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And whilst it's redeploying,
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your old page will stay up and running.
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But once it's done, the new page will take over,
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and hence, now this meetup exists here.
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And if we add another meetup here
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with this image, and our test address, and some test text.
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If we do this, now our change should also be in effect.
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And if we now reload the starting page
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a couple of times to revalidate it,
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if we now visit this meetup,
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it's created on the fly and does all the works.
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And that is also something, which I wanted to show you,
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especially combined with that redeployment feature,
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which is also something you should know.
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Now, there is, of course, more you can do.
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You can connect a custom domain here,
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and you can also configure more in your project.
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There are more features, which you can add as well,
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but I mentioned this before already.
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There are simply more things, which you could add.
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This tutorial, however, had the goal of giving you
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an overview of the most important features and,
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therefore, we're now finished with that.
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