Default the host configuration to 0.0.0.0

src/config/__init__.py

@@ -6,12 +6,12 @@ from .logging import Logging
 from .email import Email
 from .auth import Auth
 from .database import Database
-from .parse import assert_key_of_type, parse_nested_config
+from .parse import parse_nested_config
 
 
 @dataclass
 class Config:
-    host: str | None
+    host: str
     port: int | None
     logging: Logging
     email: Email
@@ -20,17 +20,14 @@ class Config:
 
     @classmethod
     def from_dict(cls, config: dict[str, Any]) -> 'Config':
-        assert_key_of_type(config, 'host', str)
-        assert_key_of_type(config, 'port', int)
-
         log_config = parse_nested_config(config, 'logging', Logging.from_dict)
         email_config = parse_nested_config(config, 'email', Email.from_dict)
         db_config = parse_nested_config(config, 'database', Database.from_dict)
         auth_config = parse_nested_config(config, 'auth', Auth.from_dict)
 
         return Config(
-            host=config['host'],
-            port=config['port'],
+            host=config.get('host', '0.0.0.0'),
+            port=config.get('port'),
             email=email_config,
             logging=log_config,
             database=db_config,

src/main.py

@@ -57,7 +57,7 @@ def main():
     config = parse_config(args.config)
     app = create_app('Cereal', config)
     logger.info(str(config))
-    serve(app, host='0.0.0.0' if config.host is None else config.host, port=config.port)
+    serve(app, host=config.host, port=config.port)
 
 
 if __name__ == '__main__':