operator documentation missing: server encryption

[sven-dmlr]

Situation

There is no documentation in https://mercedes-benz.github.io/sechub/latest/sechub-operations.html how to setup server encryption.

There are snippets in

• https://mercedes-benz.github.io/sechub/latest/sechub-restapi.html#admin-starts-encryption-rotation
• https://mercedes-benz.github.io/sechub/latest/sechub-techdoc.html#data-encryption

...but nowhere is explained how to create an encryption key (which is needed for the environment variable for activating encryption)

Wanted

Append documentation to the sechub-operations document on how to set up SecHub server encryption.

It should contain for SecHub server as well as for PDS:

• how to query the current encryption status
• how to create an encryption key for each algorithm
  • create a random 16- (AES_GCM_SIV_128) or 32-character string (AES_GCM_SIV_256) <string> and
    echo -n "<string>" | base64
  • and a hint how to use the developer-admin-ui for creating keys
• steps to prepare (which environment variables have to be set)
• how to enable encryption (or renew the encryption key / key rotation)
• how to verify that encryption is now working