Added gulp and postcss

gulpfile.js

@@ -0,0 +1,32 @@
+const del = require('del');
+const gulp = require('gulp');
+const postcss = require('gulp-postcss');
+const sass = require('gulp-sass')(require('sass'));
+
+const src = 'src/stylesheets/main.scss';
+const dest = 'public/css';
+
+gulp.task('styles', () => {
+	const plugins = [
+		require('autoprefixer'),
+	];
+
+	return gulp.src(src)
+		.pipe(sass().on('error', sass.logError))
+		.pipe(postcss(plugins))
+		.pipe(gulp.dest(dest));
+});
+
+gulp.task('clean', () => {
+	return del([
+		dest
+	]);
+});
+
+gulp.task('default', gulp.series([ 'clean', 'styles' ]));
+
+gulp.task('watch', () => {
+	gulp.watch('src/stylesheets/**/*.scss', (done) => {
+		gulp.series([ 'clean', 'styles' ])(done);
+	});
+});

package.json

@@ -31,8 +31,13 @@
 		"serve-static": "^1.14.2"
 	},
 	"devDependencies": {
+		"autoprefixer": "^10.4.2",
+		"del": "^6.0.0",
 		"eslint": "^8.6.0",
 		"eslint-plugin-jest": "^25.7.0",
+		"gulp": "^4.0.2",
+		"gulp-postcss": "^9.0.1",
+		"gulp-sass": "^5.1.0",
 		"jest": "^27.4.7",
 		"jest-extended": "^1.2.0",
 		"sass": "^1.49.0"