Add SSL support to grpc-balancer and update playbook for certificate management

- Modified grpc-balancer.py to start an SSL server using certificates.
- Added Ansible tasks in playbook.yml to create and install SSL certificates.
- Updated docker-compose.yaml to mount the SSL certificate into the container.

playbook.yml

@@ -203,6 +203,20 @@
           - waitress
         extra_args: --break-system-packages
 
+    - name: Create SSL certificate for grpcbalancer
+      ansible.builtin.shell: |
+        mkdir -p /root/node
+        openssl req -x509 -newkey rsa:4096 -keyout /root/node/key.pem -out /root/node/cert.pem -days 365 -nodes -subj "/CN=localhost"
+      args:
+        creates: /root/node/cert.pem
+
+    - name: Install SSL certificate to system store
+      ansible.builtin.shell: |
+        cp /root/node/cert.pem /usr/local/share/ca-certificates/grpcbalancer.crt
+        update-ca-certificates
+      args:
+        executable: /bin/bash
+
     - name: Copy grpcbalancer service file
       ansible.builtin.copy:
         dest: /etc/systemd/system/grpcbalancer.service
@@ -269,6 +283,11 @@
       args:
         chdir: "{{ ansible_env.HOME }}/node"
 
+    - name: Update certificates in container
+      ansible.builtin.shell: docker exec infernet-node update-ca-certificates
+      args:
+        executable: /bin/bash
+
     - name: Deploy contracts
       ansible.builtin.shell: project=hello-world make deploy-contracts 2>&1
       register: contract_deploy_output