add automatic compression

docs/index.html

@@ -22,6 +22,7 @@
     <script src="https://cdn.jsdelivr.net/npm/vue-i18n/dist/vue-i18n.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/marked/lib/marked.js"></script>
     <script src="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release/build/highlight.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/gh/xkeshi/image-compressor/dist/image-compressor.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/cropperjs/dist/cropper.js"></script>
 
     <script src="./dist/index.js"></script>