✨(frontend) add config provider

Add a ConfigProvider to the frontend to provide
configuration to the app.
The configuration is loaded from the config
endpoint, we will use react-query cache capabilities
to store the configuration.

CHANGELOG.md

@@ -15,6 +15,8 @@ and this project adheres to
 - 🌐(frontend) Add German translation #255
 - ✨(frontend) Add a broadcast store #387
 - ✨(backend) whitelist pod's IP address #443
+- ✨(backend) config endpoint #425
+- ✨(frontend) config endpoint #424
 
 ## Changed