feat: use dart sass instead of node sass.

frontend/gulpfile.js

@@ -1,7 +1,7 @@
 "use strict";
 
 const gulp = require("gulp");
-const sass = require("gulp-sass");
+const sass = require('gulp-sass')(require('sass'));
 const sourcemaps = require("gulp-sourcemaps");
 const cleanCss = require("gulp-clean-css");
 const htmlMinifier = require("gulp-html-minifier");

frontend/package.json

@@ -15,7 +15,7 @@
     "gulp-eslint": "5.0.0",
     "gulp-html-minifier": "0.1.8",
     "gulp-rename": "1.3.0",
-    "gulp-sass": "4.0.1",
+    "gulp-sass": "5.1.0",
     "gulp-sourcemaps": "2.6.4",
     "gulp-uglify": "3.0.0",
     "highlightjs": "9.10.0",