Vue it is

I know, the 18th front-end change; I have a feeling there won't be a
19th.

src/app/.postcssrc.js

@@ -0,0 +1,8 @@
+// https://github.com/michael-ciniawsky/postcss-load-config
+
+module.exports = {
+  "plugins": {
+    // to edit target browsers: use "browserslist" field in package.json
+    "autoprefixer": {}
+  }
+}