Creating notebook instance - build error

[marinadeletic]

Building of the mlops-dev image step 4 of the environments_setup/mlops-kfp-mlmd/creating-notebook-instance returns the following error in step 2 of the build:

W: GPG error: http://packages.cloud.google.com/apt gcsfuse-bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B57C5C2836F4BEB NO_PUBKEY FEEA9169307EA071
E: The repository 'http://packages.cloud.google.com/apt gcsfuse-bionic InRelease' is not signed.
W: GPG error: http://packages.cloud.google.com/apt cloud-sdk-bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B57C5C2836F4BEB NO_PUBKEY FEEA9169307EA071
E: The repository 'http://packages.cloud.google.com/apt cloud-sdk-bionic InRelease' is not signed.

Adding the following to the Docker file prior to the update statement seems to have fixed it
**RUN curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - **

Not sure if this is a common error folks have encountered but wanted to flag it.