Gulp system

Needs adding to the automation pipeline but manual will do for now...

gulpfile.js

@@ -0,0 +1,44 @@
+"use strict";
+
+var gulp = require('gulp');
+
+var autoprefixer = require('autoprefixer')
+var terser = require('gulp-terser');
+var sass = require('gulp-sass');
+var postcss = require('gulp-postcss')
+var flatten = require('gulp-flatten');
+var csso = require('gulp-csso');
+var spawn = require('child_process').spawn;
+
+sass.compiler = require('node-sass');
+
+function styles(done) {
+    return gulp.src(['src/sass/screen.scss'])
+    .pipe(sass().on('error', sass.logError))
+    .pipe(flatten())
+    .pipe(postcss([ autoprefixer() ]))
+    .pipe(csso())
+    .pipe(gulp.dest('static/css/'))
+    .on('end', done);
+}
+
+function scripts(done) {
+    return gulp.src(['node_modules/@fortawesome/fontawesome-free/js/all.min.js'])
+    .pipe(flatten())
+    .pipe(terser())
+    .pipe(gulp.dest('static/js/'))
+    .on('end', done);
+}
+
+function up(done) {
+    spawn('hugo', ['serve', '-w', '-D'], {stdio: 'inherit'});
+    done();
+}
+
+function watchFiles(done) {
+  gulp.watch("src/sass/*.scss", styles);
+  done();
+}
+
+exports.build = gulp.parallel(styles, scripts);
+exports.watch = gulp.parallel(watchFiles, up);