add yaml config file mvp

open_notebook/config.py

@@ -0,0 +1,17 @@
+import os
+
+import yaml
+from loguru import logger
+
+# todo: enable config file overwrite with env vars
+current_dir = os.path.dirname(os.path.abspath(__file__))
+project_root = os.path.dirname(current_dir)
+config_path = os.path.join(project_root, "open_notebook_config.yaml")
+
+try:
+    with open(config_path, "r") as file:
+        CONFIG = yaml.safe_load(file)
+except Exception:
+    logger.critical("Config file not found, using empty defaults")
+    logger.debug(f"Looked in {config_path}")
+    CONFIG = {}