build: custom vercel script to ignore 'next' branch commits (#5515)

* Added ignore build step for next deployments

Note this is connected to Vercel configuration, if this script is removed or altered, the
Vercel configuration on their console should be consulted and/or changed

Co-authored-by: Mike Hardy <github@mikehardy.net>

script.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+# As we currently have two deployments of react-native-firebase. 
+# One is one producetion https://vercel.com/invertase/react-native-firebase
+# Another is new modules located at https://vercel.com/invertase/react-native-firebase-next
+
+# This script when combined with the ignore build step command https://vercel.com/invertase/react-native-firebase-next/settings/git
+# ensures that only the @invertase/next will cause a build on the new modules deployments.
+
+# This does not affect the main production deployment.
+
+echo "VERCEL_GIT_COMMIT_REF: $VERCEL_GIT_COMMIT_REF"
+
+if [[ "$VERCEL_GIT_COMMIT_REF" == "@invertase/next"  ]] ; then
+  # Proceed with the build
+    echo "✅ - Detected this is a build of @invertase/next - build can proceed"
+  exit 1;
+
+else
+  # Don't build
+  echo "🛑 - This is not a build of @invertase/next build cancelled"
+  exit 0;
+fi