The mongodb container will likely throw a permission error when being started for the first time.
error: 'An error occurred when creating an index for collection "users: getaddrinfo EAI_AGAIN mongodb',
reason: undefined,
details: undefined,
errorType: 'Meteor.Error'
Therefore, you have to adjust the permissions of the mongodb volume path. For example with the following command:
sudo chmod -R 777 /mnt/docker-volumes/rocketchat