Documentation update for Starting backend

**Documentation Type**

- [ ] New Feature
- [ x ] Fix current documentation (errors)

**Background**
Explain the need for new documentation. What problem does it solve?
In section **Start Incident Accuracy Reporting System web application**, under _Start backend_ it states `cd backend`.

**Suggested Solution**
Explain the proposed documentation update
Update to `cd backend/STT-Audio`.

**Screenshots**
Include screenshots of current documentation/ errors in following documentation if applicable

**Acceptance Criteria**
Provide requirements to test that the documentation is correct