[📚 Docs]: UNSPLASH_API should not be Optional

Issue

Issue with the UNSPLASH_API being optional is, as of the dio interceptors we have, on error such as 401 status code will navigate us back to onboarding screen. An we get this 401 from unsplash api with this endpoint https://api.unsplash.com/photos/?client_id=&page=1&per_page=18 where the client ID is empty.

Fix

In the readme docs Line 46

plane-mobile/README.md

Line 46 in e0b8c53

    
           2. Define the variables BASE_API (required) and UNSPLASH_API_KEY (optional) in the `.env` file and initialize them.

Should be updated to make it mandatory (recommended) or providing some free API KEY will also solve this.