Add --prod flag to vercel build

Author: piyush-jaiswal

.github/workflows/deploy_production.yml

@@ -32,7 +32,7 @@ jobs:
               run: vercel pull --yes --environment=production --token=${{ secrets.VERCEL_TOKEN }}
 
             - name: Build Project Artifacts
-              run: vercel build --token=${{ secrets.VERCEL_TOKEN }}
+              run: vercel build --prod --token=${{ secrets.VERCEL_TOKEN }}
 
             - name: Deploy Project Artifacts to Vercel
               run: vercel deploy --prebuilt --prod --token=${{ secrets.VERCEL_TOKEN }}