compress all HTML files (#3568)

* compress all HTML files

* remove gz files, they get zipped in the build pipeline

* Update build.yaml

* removed flipImageSize.png, it is not used anywhere anymore

* Update build.yaml

.github/workflows/build.yaml

@@ -86,7 +86,16 @@ jobs:
         cp -r ./sd-card/html/* ./html/
 
         echo "Replacing variables..."
-        cd html; find . -type f -exec sed -i 's/$COMMIT_HASH/${{ steps.vars.outputs.sha_short }}/g' {} \;
+        cd html
+        find . -type f -exec sed -i 's/$COMMIT_HASH/${{ steps.vars.outputs.sha_short }}/g' {} \;
+        echo "compressing all html files..."
+        find . -name "*.html" -type f -exec gzip {} \;
+        find . -name "*.css" -type f -exec gzip {} \;
+        find . -name "*.js" -type f -exec gzip {} \;
+        find . -name "*.jpg" -type f -exec gzip {} \;
+        find . -name "*.png" -type f -exec gzip {} \;
+        find . -name "*.svg" -type f -exec gzip {} \;
+        find . -name "*.map" -type f -exec gzip {} \;
 
     - name: Prepare Demo mode files
       run: |