Fix missing highlightJS stylesheets

This commit renames the hilightjs stylesheet to include the ".min.css"
file suffix. Without that, highlightJS cannot load the custom
stylesheets.

Fixes gh-63

gulpfile.js

@@ -1,4 +1,5 @@
 const { src, dest, series, parallel, watch } = require('gulp'),
+    del = require('del'),
     gulpSass = require('gulp-sass'),
     asciidoctor = require('@asciidoctor/gulp-asciidoctor'),
     gulpConnect = require('gulp-connect');
@@ -14,6 +15,11 @@ const paths = {
  * Building the theme
  */
 
+// Cleans the build folder for the dev lifecycle
+function clean(cb) {
+    del([paths.dist + '**'], cb());
+}
+
 // Compile SASS files to build/dist/css/
 function sass() {
     return src(paths.sass)
@@ -71,6 +77,11 @@ function watchFiles(cb) {
     cb();
 }
 
+// cleans the build folder for the dev lifecycle
+function cleanDev(cb) {
+    del([paths.web + '**'], cb());
+}
+
 // Serve sample document and reload for changes
 function connect(cb) {
     gulpConnect.server({
@@ -80,7 +91,7 @@ function connect(cb) {
     cb();
 }
 
-const build = series(sass, copyResource);
+const build = series(clean, sass, copyResource);
 const update = series(build, copyDist, render);
 exports.default = build;
-exports.dev = series(update, parallel(connect, watchFiles));
+exports.dev = series(cleanDev, update, parallel(connect, watchFiles));

package.json

@@ -4,9 +4,9 @@
   "version": "0.1.1",
   "repository": "https://github.com/spring-io/spring-doc-resources",
   "license": "Apache-2.0",
-  "dependencies": {},
   "devDependencies": {
     "@asciidoctor/gulp-asciidoctor": "^2.2.5",
+    "del": "^6.0.0",
     "gulp": "^4.0.2",
     "gulp-connect": "^5.7.0",
     "gulp-sass": "^4.1.0",