GULP Cannot GET / why error?

Question

gulp.js

Hello! When running gulp, the page localhost:3000 opens with a Cannot GET / error. The question is, what could be wrong?

gulpfile.js

let project_folder = "dist";
let source_foled = "src";

let path = {
  build: {
    html: project_folder + "/",
    css: project_folder + "/css/",
    js: project_folder + "/js/",
    img: project_folder + "/img/",
    fonts: project_folder + "/fonts/",
  },
  src: {
    html: project_folder + "/*.html",
    css: project_folder + "/scss/style.scss",
    js: project_folder + "/js/script.js",
    img: project_folder + "/img/**/*.{jpg,png,svg,gif,ico,webp}",
    fonts: project_folder + "/fonts/*.ttf",
  },
  watch: {
    html: project_folder + "/**/*.html",
    css: project_folder + "/scss/**/*.scss",
    js: project_folder + "/js/**/*.js",
    img: project_folder + "/img/**/*.{jpg,png,svg,gif,ico,webp}"
  },
  clean: "./" + project_folder + "/"
}

let { src, dest } = require('gulp'),
  gulp = require('gulp'),
  browsersync = require("browser-sync").create();
  fileinclude = require("gulp-file-include");

function browserSync(params) {
  browsersync.init({
    server: {
      baseDir: "./" + project_folder + "/"
    },
    port: 3000,
    notify: false
  })
} 

function html() {
  return src(path.src.html)
  .pipe(fileinclude())
  .pipe(dest(path.build.html))
  .pipe(browsersync.stream())
}

let build = gulp.series(html);
let watch = gulp.parallel(build, browserSync);

exports.html = html;
exports.build = build;
exports.watch = watch;
exports.default = watch;

E:\OS\OpenServer\domains\im.local>gulp
[19:02:48] Using gulpfile E:\OS\OpenServer\domains\im.local\gulpfile.js
[19:02:48] Starting 'default'...
[19:02:48] Starting 'browserSync'...
[19:02:48] Starting 'html'...
[19:02:48] Finished 'html' after 34 ms
[Browsersync] Access URLs:
 --------------------------------------
       Local: http://localhost:3000
    External: http://192.168.1.103:3000
 --------------------------------------
          UI: http://localhost:3001
 UI External: http://localhost:3001
 --------------------------------------
[Browsersync] Serving files from: ./dist/

Answer 1

.pipe(gulp.dest('./));
Gulp doesn't know where to put files.