[build] added webapp task

build/webapp.js

@@ -0,0 +1,28 @@
+const gulp = require('gulp');
+const concat = require('gulp-concat');
+const uglify = require('gulp-uglify');
+const babel = require('gulp-babel');
+const template = require('gulp-template');
+
+
+const index = () => function index() {
+    return gulp.src('src/webapp/index.html')
+        .pipe(template({
+            scripts: ['app.min.js'],
+            swf: 'tankz.swf'
+        }))
+        .pipe(gulp.dest('target'))
+};
+
+const js = () => function js() {
+    const src = [
+        'src/webapp/js/*.js'
+    ];
+    return gulp.src(src)
+        .pipe(babel({presets: ['es2015']}))
+        .pipe(uglify())
+        .pipe(concat('app.min.js'))
+        .pipe(gulp.dest('target'))
+};
+
+exports['webapp'] = gulp.parallel(index(), js());