restore composer.json, add mysqli extension

public/vendor/editor/postcss.config.js

@@ -0,0 +1,10 @@
+// It is handy to not have those transformations while we developing
+if (process.env.NODE_ENV === "production") {
+  module.exports = {
+    plugins: [require("autoprefixer"), require("cssnano")]
+  };
+} else if (process.env.NODE_ENV === "development") {
+  module.exports = {
+    plugins: [require("autoprefixer")]
+  };
+}