Fixed config

- config didn't work now it's working properly
- it takes config from envirionment variable FLASK_CONFIG
- if no such variable exists it uses Development config as default

app/requirements.txt

@@ -0,0 +1,11 @@
+click==8.1.3
+Flask==2.2.2
+Flask-SQLAlchemy==3.0.2
+greenlet==2.0.1
+importlib-metadata==5.0.0
+itsdangerous==2.1.2
+Jinja2==3.1.2
+MarkupSafe==2.1.1
+SQLAlchemy==1.4.44
+Werkzeug==2.2.2
+zipp==3.10.0