import { Argv } from 'yargs';
export declare const builder: (_: Argv) => Argv<{
    port: number;
} & {
    env: string;
} & {
    mode: string;
} & {
    secure: boolean;
} & {
    open: boolean;
} & {
    hot: boolean;
} & {
    hostname: string;
} & {
    logLevel: string;
}>;