fix: Update docs showing how to use ESM instead of CommonJS and WS to connect to local node

[ltfschoen]

Updates to documentation to close this issue https://github.com/zeitgeistpm/sdk-next/issues/12

Update to use ws instead of wss since it's most likely users will start building in development and if they follow the instructions and run the local Zeitgeist node in a docker container it will only accept ws. I've highlighted that they should prepare to use wss in production for users that don't already know

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[maltekliemann]

@yornaath Could you take a quick look at this?