adding GRPC envs to portal .env.example

Author: simonredfern

apps/portal/.env.example

@@ -111,6 +111,11 @@ PUBLIC_SPONSOR_INFO_URL="http://www.example.com/info.html"
 # Defaults to https://chat.openbankproject.com if not set
 PUBLIC_OBP_CHAT_URL="https://chat.openbankproject.com"
 
+# OBP gRPC endpoint (used for live chat streaming). Server-only — the browser talks to SvelteKit's /backend/chat/[chatRoomId]/stream SSE proxy, never directly to gRPC.
+OBP_GRPC_HOST=localhost:50051
+OBP_GRPC_AUTH_METADATA_KEY=authorization
+OBP_GRPC_AUTH_METADATA_VALUE_TEMPLATE=Bearer {token}
+
 
 
 # Undocumented Features (use with caution)