Gulpfile for minifying code from TS to JS

gulpfile.js

const gulp = require("gulp");
const ts = require("gulp-typescript");
const sourcemaps = require("gulp-sourcemaps");
const tsProject = ts.createProject("tsconfig.json", {
  typescript: require("typescript")
});

gulp.task("build", () => {
  gulp.src("process.yml")
    .pipe(gulp.dest("dist"));
   
  return tsProject.src()
    .pipe(sourcemaps.init())
    .pipe(tsProject())
    .js
    .pipe(sourcemaps.write())
    .pipe(gulp.dest("dist"));  
});

gulp.task("watchTask", function () {
  gulp.watch("src/**/*.ts", ["build"]);
});

gulp.task("default", gulp.series("build"));
gulp.task("watch", gulp.series("build", "watchTask"));