Better handling for MM2.json config not found error

[damascene]

When I launch the bot without having a config file MM2.json in pytomicDEX_makerbot/config/ I get the following error:

FileNotFoundError: Komodefi SDK config not found at /home/user/pytomicDEX_makerbot/config/MM2.json!

Traceback

coins file not found, downloading...
Traceback (most recent call last):
  File "/home/user/pytomicDEX_makerbot/makerbot.py", line 10, in <module>
    from models import Tui
  File "/home/user/pytomicDEX_makerbot/models.py", line 1069, in <module>
    table = Table()
            ^^^^^^^
  File "/home/user/pytomicDEX_makerbot/models.py", line 447, in __init__
    self.dex = Dex()
               ^^^^^
  File "/home/user/pytomicDEX_makerbot/models.py", line 45, in __init__
    self.api = pykomodefi.KomoDeFi_API(config=self.mm2_config)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/top/.cache/pypoetry/virtualenvs/trading-5fBmn1aJ-py3.11/lib/python3.11/site-packages/pykomodefi/models.py", line 10, in __init__
    self.set_config(config)
  File "/home/top/.cache/pypoetry/virtualenvs/trading-5fBmn1aJ-py3.11/lib/python3.11/site-packages/pykomodefi/models.py", line 39, in set_config
    raise FileNotFoundError(f"Komodefi SDK config not found at {config}!")
FileNotFoundError: Komodefi SDK config not found at /home/user/pytomicDEX_makerbot/config/MM2.json!

I think printing an error and suggestion to get the file would be better.