Runtime Config 
@storefront-x/runtime-config
Runtime config module allows you to define config values that are not baked-in during build process. This is useful when you need to set some config value (e.g. API key) during application start-up, or when you need to dynamically change it during runtime.
How to define runtime config variable 
Create new file inside the runtime/config/ concept directory. It default exports said variable. Name of this file will correspond with name of the runtime config variable,
TIP
This file is executed only on the server, so it can access server specific context like process.env.
Example 
// my-module/runtime/config/NODE_ENV.ts
export default process.env.NODE_ENV as stringHow to access runtime config variable 
Because runtime config variables have access to the server, they can't be imported directly (they would not work on the client). For accessing runtime config variables, there is an getRuntimeConfigValue util function which takes name of the runtime config variable as an argument and returns its value.
Example 
<template>
  <h1>{{ NODE_ENV }}</h1>
</template>
<script setup>
import getRuntimeConfigValue from '#ioc/utils/getRuntimeConfigValue'
const NODE_ENV = getRuntimeConfigValue('NODE_ENV')
</script>