Hi @Alfredomg49,
Welcome to Google Cloud Community!
Can you provide the content of your cloudbuild.yaml file? Also, please provide the command you are using when deploying your app. The error is encountered usually if the directory is not present or your Dockerfile is not in the same working directory.
Verify that your Dockerfile is correctly placed in the directory you’re building the container from. Double-check the path used in your deployment configuration to point to the correct location of the Dockerfile. You can also check on this post from Server Fault for some insights. Also, retrying to run the deploy command sometimes will fix the issue.
I hope the above information is helpful.