[ENH]: Allow configuration of environment variables

[mrsimonemms]

Description

Thanks for this chart, it works well. I'd like to move the GOTIFY_DEFAULTUSER_NAME and GOTIFY_DEFAULTUSER_PASS into a secret.

My suggestion is to wrap these in an if statement and then have an additionalEnvVars array of objects that can be used. This then would have something like this in the configuration:

additionalEnvVars:
  - name: GOTIFY_DEFAULTUSER_NAME
    valueFrom:
      secretKeyRef:
        name: some-secret
        key: username
  - name: GOTIFY_DEFAULTUSER_PASS
    valueFrom:
      secretKeyRef:
        name: some-secret
        key: password

Additional Information

Will raise a PR for this