Add authentication server, dev CLI, Docker multi-service setup, and cross-platform improvements

server/internal/interceptor/timesync.go

@@ -0,0 +1,25 @@
+package interceptor
+
+import (
+	"context"
+	"fmt"
+
+	"lunar-tear/server/internal/gametime"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+)
+
+func TimeSync(ctx context.Context, req any, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (any, error) {
+	resp, err := handler(ctx, req)
+	switch info.FullMethod {
+	case "/apb.api.user.UserService/Auth",
+		"/apb.api.user.UserService/RegisterUser",
+		"/apb.api.user.UserService/TransferUser":
+	default:
+		grpc.SetTrailer(ctx, metadata.Pairs(
+			"x-apb-response-datetime", fmt.Sprintf("%d", gametime.NowMillis()),
+		))
+	}
+	return resp, err
+}