Remove grpc-balancer.py and update deployment configuration

- Deleted grpc-balancer.py as part of the cleanup process, streamlining the application setup.
- Updated playbook.yml to include new commands for managing the grpcbalancer service and SSL certificate.
- Modified docker-compose.yaml to remove the mounting of the SSL certificate, reflecting the updated deployment strategy.
- Adjusted rebuild.sh to change the working directory to ~/node for consistency in project structure.

rebuild.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -e 
-cd ~/ritual
+cd ~/node
 project=hello-world make deploy-container
 project=hello-world make deploy-contracts
 bash update_contracts.sh