nuxt fn to create a folder

get path.md

nuxt.config.ts (config upload path)

export default defineNuxtConfig({
    telemetry: false,

    runtimeConfig: {
        paths: {
            upload: path.join(process.cwd(), '../upload'),  //fs.realpathSync( '../upload') --> will be an error, if it does not exist
            
        }
    },
    // ...
});

/server/utils/folderTools.ts (exports will be loaded in all server/**/*.ts)

export async function checkOrCreateUploadFolder(folderName:string) {
    let err:any = false;

    const UPLOAD_PATH = path.join(useRuntimeConfig().paths.upload, folderName);

    let exists = await fs.realpath(UPLOAD_PATH).catch(_ => null);
    
    if (!exists) {
        fs.mkdir(UPLOAD_PATH, {recursive: true}).catch( e => err = {msg: e.msg});

        exists = await fs.realpath(UPLOAD_PATH).catch(_ => null);
    }
    
    return {err, path: exists};
}