In the startFabric.sh from your tuna-app, you launch the cli container using:
docker-compose -f ./docker-compose.yml up -d cli
Have a look at the mounting declaration of the persistent volumes in your compose yaml file. You should see something like this because the tuna-app is based on fabcar from the fabric-samples:
If you see this declaration, copy in your local machine the folder /hyperledger/fabric/core/chaincode/lib/cid into your chaincode folder. You should find it in chaincode/abac if you are using the last version of fabric samples (https://github.com/hyperledger/fabric-samples).