refactor codebase

.gitignore

README.md

app.py

app/__init__.py

app/db.py

app/routes/auth.py

app/routes/discounts.py

app/routes/errors.py

app/routes/home.py

app/routes/inventory.py

app/routes/payments.py

app/routes/reports.py

app/routes/reservations.py

app/routes/users.py

app/schema.sql

app/static/css/login.css

app/static/css/styles.css

app/static/img/res.jpg

app/static/js/login.js

app/static/js/scripts.js