feat: add HTML index page for browser viewing

Add a beautiful HTML landing page when visiting relay in browser:
- Shows all three protocol endpoints (gRPC, Connect, WebSocket)
- Lists supported NIPs (01, 09, 11)
- Displays relay features and info
- Responsive design with gradient styling
- Serves on GET requests (regular Accept header)
- NIP-11 still served for Accept: application/nostr+json

1 files changed, 1 insertions, 0 deletions

diff --git a/cmd/relay/main.go b/cmd/relay/main.go
index 9cf6ad6..56668fc 100644
--- a/cmd/relay/main.go
+++ b/cmd/relay/main.go
@@ -51,6 +51,7 @@ func main() {
         mux.Handle(path, handler)
 
         wsHandler := wshandler.NewHandler(store, subManager)
+        wsHandler.SetIndexData(*grpcAddr, *wsAddr, *wsAddr)
         mux.Handle("/", wsHandler)
 
         grpcLis, err := net.Listen("tcp", *grpcAddr)