docs: added script to ignore builds in vercel (#3370)

* docs: added script for vercel builds

* fix exit

www/docs/vercel-ignore.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+current_branch=$(git branch --show-current)
+
+if [[ "$VERCEL_DEPLOY_BRANCHES" == *"$current_branch"* ]]; then
+  echo "Branch allowed to deploy"
+  exit 1;
+else
+  echo "Branch not allowed to deploy"
+  exit 0;
+fi