doc (cli/pubsub): document new `--public` flags: `--public` option is documented for `subscribe`, `subscriptions` and `node subscriptions get`, with examples. A warning has been added to show explicitely the privacy implication of using `--public` with `subscribe`. rel 365

This directory and subdirectories contain files to build and manage Docker images of Salut à Toi.

Please refer to documentation for details.