Add ConfigMap to ENV support

[devholic]

ConfigMag, Secret에서 ENV Variable로 변경되는 기능이 추가되면 좋을 것 같습니당~

[ryuheechul]

@devholic 무슨 이슈였는지 이제 기억이 안나네요 -0-

[cardia]

galley에 하드코딩 된 무언가가 있다거나? 🤔

[winterjung]

이미 구현된 기능 아닐까요?

[ryuheechul]

아리송송 달송..

[devholic]

So I updated description :doge: @ryuheechul

[ryuheechul]

I still can't get it. Can you show me an example, please?

[devholic]

Current version of galley converts env variables to configmap, secret or env snippet.
I think extract env variables from configmap, secret, env snippet may help developers in some situations.

e.g.) If configmap provided as input,

apiVersion: v1
kind: ConfigMap
data:
  doge: pepe
  sunglass: true
metadata:
  name: some-configmap
  namespace: galley

extract env variables like below

doge=pepe
sunglass=true

[ryuheechul]

Thanks! Now it's crystal clear!