refactor(asset): Inline source maps to enable debug in JCEF

The webapp is now built with a override of the default
react-script webpack config, this override disables
optimizations and inline source maps.

Workaround of facebook/create-react-app#790, by using
`react-script-rewired` and passing a custom webpack
configuration override.

The non-modifiable webpack config passed to react-script is
located here :
`excalidraw-assets/node_modules/react-scripts/config/webpack.config.js`

Related to #7

excalidraw-assets/config-overrides.js

@@ -0,0 +1,14 @@
+module.exports = function override(config, env) {
+    // see https://webpack.js.org/configuration/
+    console.log("Disabling build minimizer (config-overrides.js)");
+    config.mode = "development";
+    config.optimization.minimize = false;
+    config.optimization.minimizer = [];
+
+    // https://webpack.js.org/configuration/devtool/
+    console.log("Inline SourceMaps (config-overrides.js)");
+    config.devtool = 'inline-source-maps'
+
+
+    return config;
+};

excalidraw-assets/package.json

@@ -13,6 +13,7 @@
     "@types/react-dom": "^17.0.8",
     "awesome-debounce-promise": "^2.1.0",
     "react": "^17.0.2",
+    "react-app-rewired": "^2.1.8",
     "react-dom": "^17.0.2",
     "react-scripts": "4.0.3",
     "typescript": "^4.3.4"
@@ -29,10 +30,9 @@
     ]
   },
   "scripts": {
-    "start": "BROWSER=none cross-env NODE_ENV=development react-scripts start",
-    "build": "BUILD_PATH=./build/react-build/ react-scripts build && npx gulp",
-    "test": "react-scripts test --env=jsdom",
-    "eject": "react-scripts eject"
+    "start": "BROWSER=none cross-env NODE_ENV=development react-app-rewired start",
+    "build": "BUILD_PATH=./build/react-build/ react-app-rewired build && npx gulp",
+    "test": "react-app-rewired test --env=jsdom"
   },
   "browserslist": {
     "production": [
@@ -46,4 +46,4 @@
       "last 1 safari version"
     ]
   }
-}
+}

excalidraw-assets/yarn.lock

@@ -9700,6 +9700,13 @@ 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.yarnpkg.com/react-app-rewired/-/react-app-rewired-2.1.8.tgz#e192f93b98daf96889418d33d3e86cf863812b56"
+  integrity sha512-wjXPdKPLscA7mn0I1de1NHrbfWdXz4S1ladaGgHVKdn1hTgKK5N6EdGIJM0KrS6bKnJBj7WuqJroDTsPKKr66Q==
+  dependencies:
+    semver "^5.6.0"
+
 react-dev-utils@^11.0.3:
   version "11.0.4"
   resolved "https://registry.yarnpkg.com/react-dev-utils/-/react-dev-utils-11.0.4.tgz#a7ccb60257a1ca2e0efe7a83e38e6700d17aa37a"