Add SHA256 to trace

Author: SimonBaeumer

lib/sonar/builders/docker.py

@@ -48,7 +48,10 @@ def docker_build(
 
         client = docker_client()
         image = client.images.get(image_name)
-        logger.info("Successfully build docker-image, SHA256: {}".format(image.id))
+        logger.info("successfully build docker-image, SHA256: {}".format(image.id))
+
+        span = trace.get_current_span()
+        span.set_attribute("mck.image.sha256", image.id)
 
         return image
     except docker.errors.APIError as e: