Use Flask configuration framework to load settings

[thekaveman]

Instead of getting config manually from the settings module like:

app = Flask(__name__)
app.name = settings.APP_NAME
app.config["SQLALCHEMY_DATABASE_URI"] = settings.SQLALCHEMY_DATABASE_URI
# etc.

Flask has built-in support for loading the configuration from a number of sources. We're using the Python files format, which would look something like:

app = Flask(__name__)
app.config.from_object("eligibility_server.settings")

We can also load from a number of supported file types:

import json
app.config.from_file("config.json", load=json.load)

Or directly from certain environment variables:

app.config.from_prefixed_env()

Let's use the built-in framework for loading configuration data.

See also: Flask Configuration Best Practices

[machikoyasuda]

https://flask.palletsprojects.com/en/2.2.x/config/#configuring-from-python-files

[machikoyasuda]

https://flask.palletsprojects.com/en/2.2.x/config/#configuration-best-practices