Manage keys for signing Docker images
$ docker trust key COMMAND
| Command | Description | 
|---|---|
| docker trust | Manage trust on Docker images | 
| Command | Description | 
| docker trust key generate | Generate and load a signing key-pair | 
| docker trust key load | Load a private key file for signing | 
| Command | Description | 
| docker trust inspect | Return low-level information about keys and signatures | 
| docker trust key | Manage keys for signing Docker images | 
| docker trust revoke | Remove trust for an image | 
| docker trust sign | Sign an image | 
| docker trust signer | Manage entities who can sign Docker images | 
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    https://docs.docker.com/engine/reference/commandline/trust_key/