docs: update readme of docs folder
# Substra documentation
-## Interacting with the Substra platform
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-- [Command Line Interface](../references/cli.md)
-- [Software Development Kit](../references/sdk.md)
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-## Implementing your assets in python
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-To help you implement your assets in Python, please take a look at the [Substra Tools](https://github.com/Substra/substra-tools).
-
-## Learning about the Substra platform
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-You can find more about Substra concepts in this [dedicated section](https://doc.substra.ai/concepts.html) (metric, dataset, algo, model, traintuple, testtuple and machine learning tasks, etc.).
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-## Running the platform locally
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-- [Setup](https://doc.substra.ai/setup/local_install_skaffold.html)
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-## Debug your scripts locally
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-- [Debugging](https://doc.substra.ai/debugging.html)
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-## Resources
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-- Documentation [website](https://doc.substra.ai)
-- Documentation [repository](https://github.com/Substra/substra-documentation)
-- Chat on [Slack](https://substra-workspace.slack.com)
+The Substra documentation is hosted by Read The Docs and can be found [here](https://docs.substra.org/).
