Use /healthz in docker example

[tock-ibm]

Now that we have a health check resource on our operations endpoint (see #928) we can use it to start the docker compose network in the example in a correct way.

lets add to each service a healthcheck, and explicitly encode the arma server dependencies with depends_on.

See:
https://github.com/hyperledger/fabric-x-evm/blob/main/compose.fabric-x.full.yaml

healthcheck:
      test: ["CMD", "curl", "-sf", "http://localhost:9443/metrics"]      //<<< use `/healthz` instead
      interval: 5s
      timeout: 3s
      retries: 20
      start_period: 10s
depends_on:
      orderer-party1-assembler:
        condition: service_healthy

Orderers now form per-party router->assembler->batcher chains, and every batcher depends on all 4 consenters. This makes sure we start servers in the recommended order.

[tock-ibm]

Assigned to: @athil-gafoor