explicitly specify envs to be exported in function

kyaml/fn/runtime/container/container.go

@@ -5,8 +5,6 @@ package container
 
 import (
 	"fmt"
-	"os"
-	"strings"
 
 	runtimeexec "sigs.k8s.io/kustomize/kyaml/fn/runtime/exec"
 	"sigs.k8s.io/kustomize/kyaml/fn/runtime/runtimeutil"
@@ -177,19 +175,7 @@ func (c *Filter) getCommand() (string, []string) {
 		args = append(args, "--mount", storageMount.String())
 	}
 
-	// TODO: put these env processes into a separate function and call it in the outside of
-	// getCommand
-	os.Setenv("LOG_TO_STDERR", "true")
-	os.Setenv("STRUCTURED_RESULTS", "true")
-
-	// export the local environment vars to the container
-	for _, pair := range os.Environ() {
-		items := strings.Split(pair, "=")
-		if items[0] == "" || items[1] == "" || items[0] == tmpDirEnvKey {
-			continue
-		}
-		args = append(args, "-e", items[0])
-	}
+	args = append(args, c.Envs.GetDockerFlags()...)
 	a := append(args, c.Image)
 	return "docker", a
 }