You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: migration.go
    path of file: ./repos/teller/vendor/github.com/DopplerHQ/cli/pkg/configuration
    
    the code of the file until where you have to start completion: /*
Copyright Â© 2019 Doppler <support@doppler.com>

Licensed under the Apache License, Version 2.0 (the "Lice
    
func parseJSONConfig() map[string]oldConfig {
	fileContents, err := ioutil.ReadFile(jsonFile) // #nosec G304
	if err != nil {
		utils.HandleError(err)
	}

	var config map[string]oldConfig
	err = json.Unmarshal(fileContents, &config)
	if err != nil {
		utils.HandleError(err)
	}

	return config
}