example of what an `up` configuration file would look like in HCL

config.hcl

name = "api"
description = "Some API for whatever"

hooks {
  build = "make build"
  clean = "make clean"
}

environment {
  BAR = "here"
  FOO = "here"
}

cors {
  allowed_origins = ["example.com"]
  allowed_methods = ["GET"]
  max_age = 123123
}

lambda {
  memory = 1024
  timeout = 5
}

dns {
  zone "apex.sh" {
    record "blog.apex.sh" {
      type = "CNAME"
      ttl = 300
    }
  }
}

config.json

{
  "name": "api",
  "description": "Some API for whatever",
  "hooks": {
    "build": "make build",
    "clean": "make clean"
  },
  "environment": {
    "BAR": "here",
    "FOO": "here"
  },
  "cors": {
    "allowed_origins": null,
    "allowed_methods": null,
    "max_age": 0
  },
  "lambda": {
    "memory": 1024,
    "timeout": 5
  },
  "dns": {
    "zone": {
      "apex.sh": {
        "record": {
          "blog.apex.sh": {
            "type": "CNAME",
            "ttl": 300
          }
        }
      }
    }
  }
}

main.go

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"

	"github.com/hashicorp/hcl"
)

type Config struct {
	Name        string `json:"name"`
	Description string `json:"description"`
	Hooks       struct {
		Build string `json:"build"`
		Clean string `json:"clean"`
	} `json:"hooks"`
	Environment map[string]string `json:"environment"`
	Cors        struct {
		AllowedOrigins []string `json:"allowed_origins"`
		AllowedMethods []string `json:"allowed_methods"`
		MaxAge         int      `json:"max_age"`
	} `json:"cors"`
	Lambda struct {
		Memory  int `json:"memory"`
		Timeout int `json:"timeout"`
	} `json:"lambda"`
	Dns struct {
		Zone map[string]struct {
			Record map[string]struct {
				Type string `json:"type"`
				Ttl  int    `json:"ttl"`
			} `json:"record"`
		} `json:"zone"`
	} `json:"dns"`
}

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func main() {
	content, err := ioutil.ReadFile("./config.hcl")
	check(err)

	config := Config{}
	err = hcl.Unmarshal(content, &config)
	check(err)

	out, err := json.MarshalIndent(config, "", "  ")
	check(err)
	fmt.Printf("json equivalent:\n%v\n", string(out))

	err = ioutil.WriteFile("./config.json", out, 0644)
	check(err)
}