updated app.py and requirements.txt

app.py

@@ -6,6 +6,7 @@ app = Flask(__name__)
 app.config['SQLALCHEMY_DATABASE_URI'] = os.environ['DATABASE_URL']
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 db = SQLAlchemy(app)
+app.app_context().push()
 
 class Messageboard(db.Model):
     __tablename__ = 'messages'

requirements.txt

 # this file defines the pip packages neede by this application
 flask==3.0.2
-Flask-SQLAlchemy==2.5.1
+Flask-SQLAlchemy==3.0.4
 Jinja2
 psycopg2-binary
-SQLAlchemy==1.3.23
+SQLAlchemy>=1.4.18
\ No newline at end of file