### Description
- add igp as the zero address at the last step right writing it to file
### Drive-by changes
None
### Related issues
- fixes https://github.com/hyperlane-xyz/issues/issues/1030
### Backward compatibility
Yes
### Testing
e2e
# NOTE: This script is intended to be run from the root of the repo
# the first arg to this script is a flag to enable the hook config as part of core deployment
# motivation is to test both the bare bone deployment (included in the docs) and the deployment with the routing over igp hook (which is closer to production deployment)
HOOK_FLAG=$1
if[ -z "$HOOK_FLAG"];then
echo"Usage: fork.sh <hook>"
exit1
fi
# Optional cleanup for previous runs, useful when running locally