### What this PR does / why we need it?
- Added instructions for verifying multi-node communication environment.
- Included explanations of Ray-related environment variables for
configuration.
- Provided detailed steps for launching services in a multi-node
environment.
### Does this PR introduce _any_ user-facing change?
no
### How was this patch tested?
manually tested.
Signed-off-by: jinyuxin <jinyuxin2@huawei.com>
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