Missing env var flag for log verbosity level

Is this a BUG REPORT or FEATURE REQUEST?

FEATURE REQUEST

Versions

CCM Version:

0.10.0

Environment:

• Kubernetes version (use kubectl version): 1.15.6
• OS (e.g. from /etc/os-release): Oracle Linux Server 7.6
• Kernel (e.g. uname -a): 4.14.35-1844.1.3.el7uek.x86_64
• Others:

What happened?

As a user, I'd like to be in control of the application's log level via an environment variable. Particularly for oci-flexvolume-driver. I'd like to use something like this in my Kubernetes manifests for the Daemonset:

    env:
    - name: LOG_LEVEL
      value: ERROR

What you expected to happen?

How to reproduce it (as minimally and precisely as possible)?

Anything else we need to know?