README.md line 72 says `cp .env.example .env`, but no such file existed and
.gitignore's `.env.*` rule would have swallowed it — hence the explicit
negation alongside it.
Documents the two variables the code actually reads, VITE_BASE_API_URL and
VITE_USE_MOCKS, rather than the longer list in the README, none of which is
referenced anywhere in apps/ or libs/. Notes that Vite resolves this from the
workspace root via envDir, and that Fayda needs nothing here beyond the callback
path matching the API's FAYDA_REDIRECT_URI.
