some fixes and binary build optimization

Dockerfile

@@ -7,7 +7,7 @@ COPY ./laniakea ./laniakea
 COPY ./plugins ./plugins
 COPY ./utils ./utils
 COPY ./main.go ./
-RUN --mount=type=cache,target=/go/pkg/mod go build -trimpath -o /usr/local/bin/kurumi ./
+RUN --mount=type=cache,target=/go/pkg/mod CGO_ENABLED=0 go build -trimpath -ldflags="-s -w -X utils.BuildTime=$(date -u +%Y-%m-%d_%H:%M:%S)" -v -o /usr/local/bin/kurumi ./
 
 FROM alpine:3.23 AS runner
 WORKDIR /app