Improve os.getenv

[Xiphoseer]

Currently there are a bunch of lines like

NexusDashboard/app/__init__.py

Lines 233 to 236 in 2e4bd04

	app.config['REQUIRE_PLAY_KEY'] = os.getenv(
	'REQUIRE_PLAY_KEY',
	app.config['REQUIRE_PLAY_KEY']
	)

in app/__init__.py

Given that os.getenv returns either the default or a string and

$ python3
>>> bool("")
False
>>> bool("1")
True
>>> bool("0")
True
>>> bool("True")
True
>>> bool("False")
True

this may not be the best way to parse boolean type values, because an if on just the value may cause unituitive configuration.