doc: add example to generate config age.secrets.*.file by secrets.nix
#593
| Job | Run time |
|---|---|
| 2m 42s | |
| 3m 32s | |
| 6m 14s |
age.secrets.*.file by secrets.nix
#593
| Job | Run time |
|---|---|
| 2m 42s | |
| 3m 32s | |
| 6m 14s |