add missing feature flags to webapp

Author: Veki301

values/webapp/prod-values.example.yaml

@@ -19,7 +19,14 @@ envVars:
   FEATURE_ENABLE_DEBUG: "false"
   FEATURE_ENABLE_PHONE_LOGIN: "false"
   FEATURE_ENABLE_SSO: "false"
+  FEATURE_ENABLE_IN_CALL_REACTIONS: "true"
+  FEATURE_ENABLE_IN_CALL_HAND_RAISE: "true"
+  FEATURE_ENABLE_DETACHED_CALLING_WINDOW: "true"
+  FEATURE_ENABLE_MESSAGE_FORMAT_BUTTONS: "true"
   FEATURE_SHOW_LOADING_INFORMATION: "false"
+  FEATURE_ENABLE_CHANNELS: "false"
+  FEATURE_ENABLE_CHANNELS_HISTORY_SHARING: "false"
+  FEATURE_ENABLE_PUBLIC_CHANNELS: "false"
   URL_ACCOUNT_BASE: "https://account.example.com"
   #URL_MOBILE_BASE: "https://wire-pwa-staging.zinfra.io" # TODO: is this needed?
   URL_PRIVACY_POLICY: "https://www.example.com/terms-conditions"