Add CONFIG_PATH environment variable for configurable config file location

- Replace hardcoded remotes.yaml path with CONFIG_PATH environment variable
- Update docker-compose.yml to set CONFIG_PATH=/app/remotes.yaml
- Application now requires CONFIG_PATH to be set, enabling flexible deployment

src/artifactapi/main.py

@@ -23,7 +23,10 @@ class ArtifactRequest(BaseModel):
 app = FastAPI(title="Artifact Storage API", version="2.0.0")
 
 # Initialize components using config
-config = ConfigManager("remotes.yaml")
+config_path = os.environ.get("CONFIG_PATH")
+if not config_path:
+    raise ValueError("CONFIG_PATH environment variable is required")
+config = ConfigManager(config_path)
 
 # Get configurations
 s3_config = config.get_s3_config()