Add production builds script for Vercel

vercel-production-build.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Use this script to only deploy production builds
+# https://vercel.com/docs/platform/projects#ignored-build-step
+# https://vercel.com/support/articles/how-do-i-use-the-ignored-build-step-field-on-vercel#with-a-script
+
+echo "VERCEL_ENV: $VERCEL_ENV"
+
+if [[ "$VERCEL_ENV" == "production" ]] ; then
+  # Proceed with the build
+  echo "✅ - Build can proceed"
+  exit 1;
+
+else
+  # Don't build
+  echo "🛑 - Build cancelled"
+  exit 0;
+fi