Update dependency flask to v3

Pipfile

@@ -8,7 +8,7 @@ verify_ssl = true
 name = "pypi"
 
 [packages]
-flask = "==2.3.3"
+flask = "==3.1.1"
 python-dotenv = "==1.0.1"
 flask-migrate = "==4.0.7"
 flask-sqlalchemy  = "==3.1.1"
@@ -18,7 +18,7 @@ pyyaml = "==6.0.2"
 flask-cors = "==5.0.0"
 ldap3 = "==2.9.1"
 pymysql = "==1.1.1"
-werkzeug = "==3.1.3"
+werkzeug = "==2.3.8"
 
 [dev-packages]
 flake8 = "==7.1.1"