chore: Initial commit

app/db.py

@@ -0,0 +1,21 @@
+from flask import Flask
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, scoped_session, sessionmaker
+
+engine = None
+SessionLocal = None
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def init_db(app: Flask) -> None:  # noqa: ARG001
+    global engine, SessionLocal  # noqa: PLW0603
+
+    engine = create_engine("sqlite:///instance/app.db", echo=True, future=True)
+    SessionLocal = scoped_session(sessionmaker(bind=engine))
+
+    from . import models  # noqa: F401, PLC0415
+
+    Base.metadata.create_all(bind=engine)