Update ClusterSharding.Node example to use shared SQLite store

[dimabarbul]

Fixes #3608

Changes

ClusterSharding.Node example is updated with following:

• Correct Dockerfile to use net8.0 folder and net8.0 base image
• Use least-shard-allocation-strategy.rebalance-absolute-limit instead of least-shard-allocation-strategy.rebalance-threshold as the latter is deprecated
• Don't use host network in docker-compose.yaml to not mess with host machine ports
• Use shared SQLite database for all nodes (using docker volume) - this is crucial for rebalancing
• Use docker compose V2 as V1 is deprecated since mid of 2023

Checklist

• I have reviewed my own pull request.

[Aaronontheweb]

LGTM - nice work