Added a staging build, with react-app-rewired.

Such a simple patch. It's insane that there's still no flag for this in 2021. lol. facebook/create-react-app#790

config-overrides.js

@@ -0,0 +1,11 @@
+module.exports = function override(config, env) {
+  if (process.env.STAGING) {
+    config.mode = "development";
+    config.optimization.minimize = false;
+    config.optimization.minimizer = [];
+
+    console.log("I'm making a ghetto production build.");
+  }
+
+  return config;
+};

package.json

@@ -25,6 +25,7 @@
     "prosemirror-state": "^1.3.4",
     "prosemirror-view": "^1.18.1",
     "react": "^17.0.1",
+    "react-app-rewired": "^2.1.8",
     "react-dom": "^17.0.1",
     "react-git-info": "^2.0.0",
     "react-json-view": "^1.21.3",
@@ -40,9 +41,10 @@
     "uuid": "^8.3.2"
   },
   "scripts": {
-    "start": "react-scripts start",
-    "build": "react-scripts build",
-    "test": "react-scripts test",
+    "start": "react-app-rewired start",
+    "build:staging": "STAGING=1 yarn build",
+    "build": "react-app-rewired build",
+    "test": "react-app-rewired test",
     "eject": "react-scripts eject"
   },
   "eslintConfig": {

yarn.lock

@@ -9556,6 +9556,13 @@ react-app-polyfill@^2.0.0:
     regenerator-runtime "^0.13.7"
     whatwg-fetch "^3.4.1"
 
+react-app-rewired@^2.1.8:
+  version "2.1.8"
+  resolved "https://registry.npmjs.org/react-app-rewired/-/react-app-rewired-2.1.8.tgz#e192f93b98daf96889418d33d3e86cf863812b56"
+  integrity sha512-wjXPdKPLscA7mn0I1de1NHrbfWdXz4S1ladaGgHVKdn1hTgKK5N6EdGIJM0KrS6bKnJBj7WuqJroDTsPKKr66Q==
+  dependencies:
+    semver "^5.6.0"
+
 react-base16-styling@^0.6.0:
   version "0.6.0"
   resolved "https://registry.npmjs.org/react-base16-styling/-/react-base16-styling-0.6.0.tgz#ef2156d66cf4139695c8a167886cb69ea660792c"