devServe:{
 setup: (app) => { //解決post沒響應的問題
 app.post('/goform/**', function(req, res) {
 res.redirect(req.originalUrl); //重定向到對應路徑
 });
 }
}

app.post('/goform/*', (req, res) => {
res.setHeader('Content-Type', 'text/plain;charset=UTF-8');
let filename = path.join(__dirname,'..','..','..',`public/${req.originalUrl}.txt`);

fs.exists(filename, exists => {
 if(exists) {
 fs.createReadStream(path.join(__dirname,'..','..','..',`public/${req.originalUrl}.txt`)).pipe(res);
 }else {
 res.end(`${req.originalUrl}' <- <- 老鐵，這個接口你還沒寫。`);
 }
});