Switch to purging css only in production

Signed-off-by: Thomas A. Christensen II <25492070+MillironX@users.noreply.github.com>

.github/workflows/build-site.yml

@@ -32,7 +32,7 @@ jobs:
           npm install
       - name: Run Hugo
         run: |
-          hugo
+          hugo --environment production --minify
       - name: Deploy to gh-pages
         if: ${{ !env.ACT }}
         uses: rdarida/simple-github-pages-deploy-action@v1

postcss.config.js

@@ -6,6 +6,8 @@ const purgecss = require("postcss-purgecss")({
   },
 });
 
-module.exports = {
+if (process.env.HUGO_ENVIRONMENT === 'production') {
+  module.exports = {
     plugins: [purgecss],
-};
+  };
+}