Make the node timeout a config param

[Leo-Besancon]

The current timeout of 1 second of the client config is:

• hardcoded
• a bit low, ass it seems to be triggered when the node is up.

We should put it in the .env and increase the default value.

[AurelienFT]

Done in https://github.com/massalabs/transfers-indexer/commit/67f33c6f35d94fb878d4771bf16393c208842d5d