Fix cli

src/beaky/cli.py

@@ -1,5 +1,6 @@
 import argparse
 
+import yaml
 from pydantic import ValidationError
 
 from beaky.config import Config
@@ -9,11 +10,14 @@ def main() -> None:
     parser = argparse.ArgumentParser(
         prog="beaky"
     )
-    parser.add_argument("path", help="Path to config file.")
+
+    parser.add_argument("--config", help="Path to config file.", default="config/application.yml")
     args = parser.parse_args()
 
+    with open(args.config) as f:
+        config_dict = yaml.safe_load(f)
     try:
-        config = Config(**vars(args))
+        config = Config(**config_dict)
     except ValidationError as e:
         print("Bad arguments")
         print(e)