Hello,
This looks to be an issue caused by the Docker file for your node. Could you please provide the docker file for inspection?.
You can also refer to the following link where you may see a possible solution in case your docker file is set up, similar to the example provided in the github link.
https://getridbug.com/node-js/nodejs-in-docker-ubuntu-cannot-find-module-usr-src-app-index-js/
Regards.
Hello,
Since you do not know what service is triggering the traffic, I would recommend you open a support case at the following link for further assistance in locating the source.
https://cloud.google.com/support-hub
Regards