Is your feature request related to a problem? Please describe.
Investigate github.com/google/go-containerregistry to replace the heroku/docker-registry-client which seems to be unmaintained.

Describe the solution you'd like
Check the go-containerregistry library and see if it fits our needs.

Describe alternatives you've considered
We already use a forked version of the docker-

What would you like to be added:

Review warns about "refresh_interval" value being rendered in parse section of container input

2020-08-26 07:18:01 +0000 [warn]: parameter 'refresh_interval' in <parse>
  @type "regexp"
  expression /^(?<time>.+) (?<stream>stdout|stderr) [^ ]* (?<log>.*)$/
  time_format 

Perhaps it would be better to install the repositories before trying to install the chart. This way we could find out earlier our course is wrong.

line 237 on chart.py

Please consider providing 1 manifest.yaml file for installing the operator, for usage with e.g. kustomize.