Use SCSS and PostCSS with Rollup

package.json

@@ -1,18 +1,29 @@
 {
   "name": "housesof",
-  "description": "Houses Of website",
   "version": "1.0.0",
+  "description": "Houses Of website",
+  "author": {
+    "name": "Flayks",
+    "email": "hello@flayks.com",
+    "url": "http://flayks.com"
+  },
+  "private": true,
   "scripts": {
     "dev": "sapper dev",
-    "build": "sapper build --legacy",
-    "export": "sapper export --legacy",
-    "start": "node __sapper__/build"
+    "build": "sapper build dist --legacy",
+    "export": "sapper export export",
+    "start": "node __sapper__/build",
+    "serve": "node server/server.js"
   },
   "dependencies": {
+    "@fortawesome/fontawesome-free": "^5.12.0",
+    "animejs": "^3.1.0",
     "bulma": "^0.8.0",
     "compression": "^1.7.4",
     "dayjs": "^1.8.18",
+    "normalize.css": "^8.0.1",
     "polka": "^1.0.0-next.9",
+    "shufflejs": "^5.2.3",
     "sirv": "^0.4.2"
   },
   "devDependencies": {
@@ -21,15 +32,30 @@
     "@babel/plugin-transform-runtime": "^7.7.6",
     "@babel/preset-env": "^7.7.7",
     "@babel/runtime": "^7.7.7",
-    "@fortawesome/fontawesome-free": "^5.12.0",
     "@rollup/plugin-node-resolve": "^6.0.0",
     "@rollup/plugin-replace": "^2.3.0",
+    "autoprefixer": "^9.7.3",
+    "eslint-plugin-svelte3": "^2.7.3",
+    "node-sass": "^4.13.0",
+    "postcss": "^7.0.26",
+    "postcss-load-config": "^2.1.0",
+    "postcss-preset-env": "^6.7.0",
     "rollup": "^1.27.14",
     "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-svelte": "^5.1.1",
     "rollup-plugin-terser": "^5.1.3",
     "sapper": "^0.27.9",
-    "svelte": "^3.16.7"
-  }
+    "sass": "^1.24.0",
+    "svelte": "^3.16.7",
+    "svelte-preprocess": "^3.3.0"
+  },
+  "browserslist": [
+    "ie >= 11",
+    "last 7 ff versions",
+    "last 7 chrome versions",
+    "safari >= 10",
+    "ios >= 11",
+    "android >= 7"
+  ]
 }