Add error handling to start_engine() function if the connection string is invalid

[velac01]

Description

The start_engine() function in this repository does not currently handle errors if the connection string is invalid. This can lead to unexpected behavior, such as a crash or an error message being printed to the console.

To fix this, we can add an except clause to the start_engine() function to catch any errors that occur when trying to connect to the database. The except clause should print a more informative error message to the console, such as the specific error that occurred.

Expected Behavior

If the start_engine() function has issues, the error should be printed to the console and the program should be terminated.

[velac01]

found in db/connect.py

[velac01]

@Austin-Sansing You can test by messing with the DB_URL in the .env file