provide usage documentation with config examples

[todo]

dns-sync/cmd/root.go

Lines 59 to 62 in a0c4bb2

	//@todo: provide usage documentation with config examples
	if genDoc := os.Getenv("GEN_DOC"); genDoc == "true" {
	err := doc.GenMarkdownTree(rootCmd, "./docs")
	if err != nil {

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This issue was generated by todo based on a todo comment in a0c4bb2. It's been assigned to @undefined because they committed the code.