Fix caching in build workflow example

_config.example.yml

@@ -14,10 +14,10 @@ sass:
 # Additional exclude from processing
 exclude:
   - .github/
-  - venv/
   - README.md
   - LICENSE.md
   - REDISTRIBUTED.md
+  - purgecss.config.js
 
 # Collections and their defaults
 collections:

_config.yml

@@ -18,6 +18,7 @@ exclude:
   - REDISTRIBUTED.md
   - screenshot.png
   - jekyll-theme-conference.gemspec
+  - purgecss.config.js
   - _config.example.yml
 
 # Collections and their defaults

_tools/build.yml

@@ -23,23 +23,11 @@ jobs:
         with:
           lfs: true
 
-      - name: Setup Ruby
-        uses: actions/setup-ruby@v1
-
-      - name: Ruby Cache
-        id: cache_ruby
-        uses: actions/cache@v2
+      - name: Setup Ruby, Bundler and Jekyll
+        uses: ruby/setup-ruby@v1
         with:
-          path: vendor/bundle
-          key: ${{ runner.os }}-gem-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-gem-
-
-      - name: Install Bundler and Jekyll
-        if: steps.cache_ruby.outputs.cache-hit != 'true'
-        run: |
-          gem install bundler
-          bundle install --path vendor/bundle
+          ruby-version: 2.6
+          bundler-cache: true
 
       - name: Build website
         run: |
@@ -59,16 +47,7 @@ jobs:
         with:
           node-version: '12'
 
-      - name: NPM Cache
-        uses: actions/cache@v2
-        with:
-          path: ~/.npm
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-node-
-
       - name: Install PurgeCSS and Terser
-        if: steps.cache.outputs.cache-hit != 'true'
         run: |
           npm install -g purgecss
           npm install -g terser

_tools/purgecss.config.js

@@ -1,7 +1,7 @@
 module.exports = {
   content: ['_site/**/*.html','_site/assets/js/main.js'],
   css: ['_site/assets/css/main.css'],
-  output: '_site/assets/css/main.min.css',
+  output: '_site/assets/css/main.css',
   fontFace: true,
   safelist: {
     deep: [/^leaflet/]