Fix git hook error after dependency installation

[RiccardoBiosas]

Husky is currently set to run in a nested directory that is not at the same level as the .git directory. it's a known error (see here and here) and it was causing the installation process to terminate with Exit status 1 as in the below logs:

> husky install

.git can't be found (see https://git.io/Jc3F9)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! statuspage-example-app@1.0.0 prepare: `husky install`
npm ERR! Exit status 1

This PR fixes the issue by running the prepare command from the same level as the .git directory

[atlassian-cla-bot]

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