configureRuntimeEnvironment(environment, options = {}) {
        runtimeConfig = parseRuntime(
            Object.assign(
                {},
                require('yargs-parser')([environment]),
                options
            ),
            process.cwd()
        );

        webpackConfig = new WebpackConfig(runtimeConfig);

        return this;
    }
Initialize the runtime environment.

This can be used to configure the Encore runtime if you're
using Encore without executing the "./node_module/.bin/encore"
utility (e.g. with karma-webpack).

```
Encore.configureRuntimeEnvironment(
    // Environment to use (dev, dev-server, production)
    'dev-server',

    // Same options you would use with the
    // CLI utility with their name in
    // camelCase.
    {
        https: true,
        keepPublicPath: true
    }
)
```

Be aware that using this method will also reset the current
webpack configuration.

@param {string} environment
@param {object} options
@returns {Encore}