Added the possibility to override partial configs during deployments

Added default output to jest (for terminal output...)
Upgraded npm packages. Left jest on 27 because of breaking changes in 28

public/i18n/en.json

@@ -4,7 +4,7 @@
   },
   "navBar": {
     "intro": "Our fancy header with navigation.",
-    "version": "App version:",
+    "version": "version:",
     "currentDate": "Today's date: {{date, formattedDate}}"
   },
   "nav": {

public/i18n/nl.json

@@ -4,7 +4,7 @@
   },
   "navBar": {
     "intro": "Een fancy header met navigatie",
-    "version": "Aplicatie versie:",
+    "version": "versie:",
     "currentDate": "De datum van vandaag: {{date, formattedDate}}"
   },
   "nav": {