Chore: Add capability for overriding local development behaviour using env vars (#85603)

package.json

@@ -112,6 +112,7 @@
     "@types/google.analytics": "^0.0.46",
     "@types/gtag.js": "^0.0.20",
     "@types/history": "4.7.11",
+    "@types/ini": "^4",
     "@types/jest": "29.5.12",
     "@types/jquery": "3.5.30",
     "@types/js-yaml": "^4.0.5",
@@ -189,6 +190,7 @@
     "html-webpack-plugin": "5.6.0",
     "http-server": "14.1.1",
     "i18next-parser": "9.0.1",
+    "ini": "^4.1.3",
     "jest": "29.7.0",
     "jest-canvas-mock": "2.5.2",
     "jest-date-mock": "1.0.10",