Nuxt js dot env 적용하기 (자체 cross-env 적용기)

If you are using version > 2.13 then you won't need to install dotenv anymore because it's already built in https://nuxtjs.org/docs/directory-structure/nuxt-config/#runtimeconfig

.env support Similar to vue-cli (*), .env file will be always loaded via dotenv and is accessible via process.env and options._env. process.env is updated so one can use it right inside nuxt.config for runtime config. Values are interpolated and expanded with an improved version of dotenv-expand. .env file is also watched to reload during nuxt dev. Path can be set via cli --dotenv or disabled by --dotenv false.

I created the .env.xxx files and created the corresponding scripts