Add autoprefix to postcss

package.json

@@ -5,12 +5,14 @@
   "repository": "https://github.com/jellyfin/jellyfin-web",
   "license": "GPL-2.0-or-later",
   "devDependencies": {
+    "autoprefixer": "^9.7.3",
     "clean-webpack-plugin": "^3.0.0",
-    "copy-webpack-plugin": "^5.0.3",
+    "copy-webpack-plugin": "^5.1.1",
     "css-loader": "^2.1.0",
     "eslint": "^5.16.0",
     "file-loader": "^3.0.1",
     "html-webpack-plugin": "^3.2.0",
+    "postcss-loader": "^3.0.0",
     "style-loader": "^0.23.1",
     "webpack": "^4.41.0",
     "webpack-cli": "^3.3.9",

postcss.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+    plugins: [
+        require('autoprefixer')
+    ]
+}

webpack.dev.js

@@ -15,7 +15,7 @@ module.exports = merge(common, {
         rules: [
             {
                 test: /\.css$/i,
-                use: ["style-loader", "css-loader"]
+                use: ["style-loader", "css-loader", "postcss-loader"]
             },
             {
                 test: /\.(png|jpg|gif)$/i,

webpack.prod.js

@@ -13,12 +13,12 @@ module.exports = merge(common, {
         rules: [
             {
                 test: /\.css$/i,
-                use: ["style-loader", "css-loader"]
+                use: ["style-loader", "css-loader", "postcss-loader"]
             },
             {
                 test: /\.(png|jpg|gif)$/i,
                 use: ["file-loader"]
             }
         ]
-    },
+    }
 });