docs: customizing the configuration (#911)
* docs: customizing the configuration
* Update docs/config.md
Co-authored-by: Jacob Dreesen <jacob@hdreesen.de>
* Update docs/fr/config.md
Co-authored-by: Jacob Dreesen <jacob@hdreesen.de>
* Update embed.md
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Co-authored-by: Jacob Dreesen <jacob@hdreesen.de>
