Add a note not to worry
Add a note not to worry

When reading through the code for the first time and seeing redis,
those unfamiliar with docker first thought might be that they need
to install redis. Adding this sentence helps make it clearer that
this is not needed. Docker will take care of this in services.

Signed-off-by: Mazz Mosley <a54aae760072825ca6733a7dfc4aa39211f100a9@houseofmnowster.com>

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