fix RCE sync issue between host os and web container
fix RCE sync issue between host os and web container

update docker compose override file to correct
local file system sync issue with the web container
that prevented local changes to the RCE from reflecting
in Canvas without manual intervention

Change-Id: I10dd190cb76ab8a9364ff830a5d71103c7306968
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/283165
Product-Review: Jake Oeding <9601d161174d3602f0f7ee77da5115e75d23bb40@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Weston Dransfield <e9203059795dc94e28a8831c65eb7869e818825e@instructure.com>
QA-Review: Weston Dransfield <e9203059795dc94e28a8831c65eb7869e818825e@instructure.com>

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