5 Common Vercel Misconfigurations and How to Fix Them

Deploying your app on Vercel is supposed to be a seamless experience, but even the best tools can lead to headaches when misconfigured. As indie hackers and solo founders, we can't afford to waste time troubleshooting issues that could've been avoided with a bit of foresight. In this post, I’ll share five common Vercel misconfigurations we've encountered and how to fix them, so you can focus on building instead of debugging.

1. Incorrect Build Command

The Problem

One of the most frequent misconfigurations is using the wrong build command. This can lead to deployment failures or, worse, incomplete builds that don't function as expected.

The Fix

Double-check your project settings in the Vercel dashboard. The build command should match what you use locally. Most React apps, for instance, use npm run build or yarn build.

How to Verify

1. Go to your Vercel dashboard.
2. Select your project.
3. Navigate to "Settings" > "General" > "Build Command".
4. Ensure it matches your local setup.

2. Environment Variables Mismanagement

The Problem

Environment variables are crucial for your app's configuration but can easily be misconfigured or omitted. This can lead to runtime errors or unexpected behavior in production.

The Fix

Make sure all necessary environment variables are set in the Vercel dashboard under "Settings" > "Environment Variables". It's also helpful to categorize them into production and preview environments to avoid confusion.

Our Experience

We once launched without setting a critical API key, leading to a broken app. Always double-check your variables before hitting deploy!

3. Ignoring Caching Strategies

The Problem

Vercel automatically caches your builds, but if you don't configure cache settings properly, you might end up serving stale content.

The Fix

Utilize the Cache-Control header in your API responses or static files. You can configure caching in your vercel.json file or through your server configuration.

Example

{
  "headers": [
    {
      "source": "/api/(.*)",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "max-age=600, s-maxage=600"
        }
      ]
    }
  ]
}

4. Misconfigured Redirects and Rewrites

The Problem

Incorrect redirects or rewrites can result in broken links or poor SEO performance. This often happens when migrating from another platform.

The Fix

Review your vercel.json file for the "redirects" and "rewrites" sections. Ensure that the paths are correctly defined and that you're not creating loops.

Quick Tip

Use Vercel's preview deployments to test your redirects before going live. This way, you can catch issues early.

5. Lack of Monitoring and Logging

The Problem

Not setting up monitoring and logging can leave you in the dark about your app's performance and errors. This is especially critical during high-traffic periods.

The Fix

Integrate a logging service like Sentry or LogRocket to capture errors and monitor performance. Vercel also offers built-in analytics for monitoring performance metrics.

Pricing Example

• Sentry: Free tier up to 5,000 events/month; paid plans start at $29/month.
• LogRocket: Free tier available; paid plans start at $99/month.

Conclusion: Start Here

To avoid these common Vercel misconfigurations, follow the checklist outlined above. Make sure your build commands are correct, environment variables are set, caching strategies are in place, redirects are properly configured, and monitoring is established. By addressing these areas proactively, you can ensure a smoother deployment process.

What We Actually Use

In our stack, we primarily use Vercel for frontend deployments coupled with Sentry for error monitoring. This combo has worked well for us as we scale our projects.