Fixes links and installation

- add package links
- change some url
- use SCSS
- remove frameborder (deprecated)

package.json

@@ -7,6 +7,7 @@
   "license": "MIT",
   "private": true,
   "devDependencies": {
+    "@parcel/transformer-sass": "2.13.2",
     "parcel": "^2.13.2",
     "posthtml-doctype": "^1.1.1",
     "posthtml-include": "^2.0.1"