* Update to error on usage of serverRuntimeConfig with serverless

* Add tests for errors for serverless and runtime configs

* Update docs wording

2019-10-10 16:56:38 -05:00

Using `publicRuntimeConfig` or `serverRuntimeConfig` with `target` set to `serverless`

In the serverless target environment next.config.js is not loaded, so we don't support publicRuntimeConfig or serverRuntimeConfig.

Use config option env to set build time variables like such:

// next.config.js
module.exports = {
  env: {
    special: 'value',
  },
}

// pages/index.js
console.log(process.env.special) // value

Using publicRuntimeConfig or serverRuntimeConfig with target set to serverless