feature request - use env vars for secrets

[cameronbraid]

Currently you can see the secrets if you do a ps on the host and see the rclone mount command

Please use env vars when running rclone

from docs

Environment Variables

Rclone can be configured entirely using environment variables. These can be used to set defaults for options or config file entries.

Options

Every option in rclone can have its default set by environment variable.

To find the name of the environment variable, first, take the long option name, strip the leading --, change - to , make upper case and prepend RCLONE.

For example, to always set --stats 5s, set the environment variable RCLONE_STATS=5s. If you set stats on the command line this will override the environment variable setting.

[cameronbraid]

I think this will suffice #11