The README incorrectly stated Python 3.8+ was sufficient, but
backend/pyproject.toml requires Python >=3.11. This caused
installation errors for users with Python 3.8-3.10.
Fixes#27
* Remove redundant phrasing “development during development”
* Add missing auxiliary verb in sentence about updating `apiUrl`
* Insert missing preposition in same `apiUrl` sentence (“file to your host”)