[Bugfix] Fix the environment name for dev mode

It turns out Flask only considers `development` as the development mode; `dev` (used before) is
not working.

calsocial/__init__.py

@@ -72,7 +72,7 @@ class CalendarSocialApp(Flask, RoutedMixin):
 
         self._timezone = None
 
-        config_name = os.environ.get('ENV', config or 'dev')
+        config_name = os.environ.get('ENV', config or 'development')
         self.config.from_pyfile(f'config_{config_name}.py', True)
         # Make sure we look up users both by their usernames and email addresses
         self.config['SECURITY_USER_IDENTITY_ATTRIBUTES'] = ('username', 'email')

calsocial/config_development.py

@@ -1,7 +1,7 @@
 """Configuration file for the development environment
 """
 
-ENV = 'dev'
+ENV = 'development'
 #: If ``True``, registration on the site is enabled.
 REGISTRATION_ENABLED = True
 #: The default time zone