Rework the detailed guide for docker-compose instead of tmn

[etienne-napoleone]

Estimated time: 1/2h

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Why: Create-tomochain-masternode + docker-compose is now the recommended way of running a masternode.

What: Update the doc to use those tools instead of tmn

[etienne-napoleone]

Could you take care of that @nyeates as you wrote the initial guide ?

[etienne-napoleone]

@phamvancam2104 If @nyeates is not available at this time, can you please find another writer? Thanks