Counter "Hello World" tutorial should cover local development node

[miohtama]

The first tutorial should cover how to use a local testnet, deploy the contract locally and explore the testnet. This is because testing on a public testnet is difficult, as you need to access undocumented faucet to get testnet EGLD.

https://docs.elrond.com/developers/tutorials/counter/

Currently there exists erdpy tutorial for a local testnet, but it is not not connected to other tutorials. E.g. what keys are created and how to use them to deploy local testnet contracts.

multiversx/mx-sdk-py-cli#19

This is also important, because the public testnet is unstable, slower and trying to rely it for development is causing a drop of developer efficiency.

[MWFIAE]

While I agree in general I just wanted to mention that you should use the public devnet for dev purposes instead of the testnet. Since the devnet is more stable :)

[miohtama]

Thank you! I clarified the issue title.