timestamp is not included when calculate genesis block

[u4113057]

in node_server.py at line#39 when genesis block is generated timestamp is not included (included as '0') so every genesis block has the same hash

[satwikkansal]

That is a good catch, ideally we should include a timestamp while calculating the genesis block.

[satwikkansal]

feel free to create a PR for the same if you like :)