Deploying MERN app on Vercel

Click on "Add New..." and select "Project" category

Select your MERN application Git repository and Click "Import"

Click "Build and Output Settings" and check the build configuration

Click "Environment Variables"

Add all the environment variables, both "client" and "api" related.

Once deployed, continue to Project Dashboard

Copy the deployed URL"mockmeet-vercel-demo.vercel.app"

Click "Settings"

Select "Environment Variables"

Add the deployed URL along with "/api" ("mockmeet-vercel-demo.vercel.app/api") as an Environment Variable.

Click "Deployments"

Finally re-deploy by clicking "Redeploy" on the last Deployment.