checking error code

Author: BarkinKctp

packaging_automation/citus_package.py

@@ -360,7 +360,13 @@ def build_package(
     if output.stdout:
         print("Output:" + output.stdout)
     if output.returncode != 0:
-        raise ValueError(output.stderr)
+        raise ValueError(
+            "Docker command failed.\n"
+            f"Command: {docker_command}\n"
+            f"Exit code: {output.returncode}\n"
+            f"--- stdout ---\n{output.stdout}\n"
+            f"--- stderr ---\n{output.stderr}\n"
+        )
 
     if input_output_parameters.output_validation:
         validate_output(