Docker how to use boolean value on spec.container.env.value

Is there a way to pass a boolean value to the spec.container.env.value? I want to override with slam boolean env variables in parent docker image ( https://github.com/APSL/docker-thumbor ): UPLOAD_ENABLED

I made a simpler test

If you try the following yaml:

apiVersion: v1
kind: Pod
metadata:
  name: envar-demo
  labels:
    purpose: demonstrate-envars
spec:
  containers:
  - name: envar-demo-container
    image: gcr.io/google-samples/node-hello:1.0
    env:
    - name: DEMO_GREETING
      value: true

      

        
        
        
      

    

And try to create it with kubernetes, you got the following error:

kubectl create -f envars.yaml

      

        
        
        
      

    

mistake:

error: error validating "envars.yaml": error validating data: expected type string, for field spec.containers[0].env[0].value, got bool; if you choose to ignore these errors, turn validation off with --validate=false

      

        
        
        
      

    

with validate = false

Error from server (BadRequest): error when creating "envars.yaml": Pod in version "v1" cannot be handled as a Pod: [pos 192]: json: expect char '"' but got char 't'

      

        
        
        
      

    

It also doesn't work with integer values