fix: LESS styles building for WebApp (#189)

Author: ElderJames

.template.config/templates/webapp/package.json

@@ -3,9 +3,9 @@
     "version": "1.0.0",
     "description": "An out-of-box UI solution for enterprise applications as a Blazor boilerplate.",
     "scripts": {
-        "start": "dotnet watch -p ./src/Server run",
+        "start": "dotnet watch -p ./src/AntDesign.Pro.Template run",
         "build": "dotnet publish -o dist",
-        "gulp:pro": "gulp --gulpfile ./src/Client/gulpfile.js",
+        "gulp:pro": "gulp --gulpfile ./src/AntDesign.Pro.Template.Client/gulpfile.js",
         "test": "echo \"Error: no test specified\" && exit 1"
     },
     "dependencies": {

.template.config/templates/webapp/src/AntDesign.Pro.Template.Client/gulpfile.js

@@ -0,0 +1,26 @@
+var gulp = require('gulp'),
+  cleanCss = require('gulp-clean-css'),
+  less = require('gulp-less'),
+  rename = require('gulp-rename'),
+  concatCss = require("gulp-concat-css"),
+  npmImport = require("less-plugin-npm-import");
+
+gulp.task('less', function () {
+  return gulp
+    .src([
+      '**/*.less',
+      '!node_modules/**',
+      '!**/bin/**',
+      '!**/obj/**'
+    ])
+    .pipe(less({
+      javascriptEnabled: true,
+      plugins: [new npmImport({ prefix: '~' })]
+    }))
+    .pipe(concatCss('site.css'))
+    .pipe(cleanCss({ compatibility: '*' }))
+    .pipe(gulp.dest('wwwroot/css'));
+});
+
+gulp.task('default', gulp.parallel('less'), function () {
+});