Add autoprefixer and cssnano support

postcss.config.js

@@ -0,0 +1,15 @@
+const autoprefixer = require('autoprefixer');
+const cssnano = require('cssnano');
+const mqpacker = require('css-mqpacker');
+
+const conf = require('./server/config');
+
+const options = {
+  plugins: [autoprefixer, mqpacker, cssnano]
+};
+
+if (conf.env === 'development') {
+  options.map = { inline: true };
+}
+
+module.exports = options;