Adding versions to the requirements.txt

requirements.txt

-pytest
-flask
-flask_cors
-werkzeug
-click
-flask_login
-coverage
-tqdm
-requests
-flask_caching
-sphinx
-flask_SQLAlchemy
-flask_marshmallow
-marshmallow
-marshmallow-sqlalchemy
+pytest~=7.3.1
+flask~=2.3.2
+flask_cors~=3.0.10
+flask_login~=0.6.2
+coverage~=7.2.5
+tqdm~=4.65.0
+requests~=2.30.0
+flask_caching~=2.0.2
+sphinx~=7.0.0
+flask_SQLAlchemy~=3.0.3
+flask_marshmallow~=0.15.0
+marshmallow-sqlalchemy~=0.29.0
+gunicorn~=20.1.0
+psycopg2~=2.9.6