fix python version used in server mode

[ananthuts]

Description
The following error was getting thrown when running docker compose in server mode.

Traceback (most recent call last):
  File "./main.py", line 11, in <module>
    from swagger.swagger_flask import Swagger
  File "/home/floorplan_to_blender/Server/swagger/swagger_flask.py", line 20, in <module>
    from swagger.json_generator import generate_swagger_json
  File "/home/floorplan_to_blender/Server/swagger/json_generator.py", line 10, in <module>
    import requests
ModuleNotFoundError: No module named 'requests'

Cause

This was caused by a version typo in entry-point script.