fix: include generated proto in server image

Dockerfile

@@ -4,6 +4,7 @@ COPY go.mod go.sum ./
 RUN go mod download
 COPY cmd ./cmd
 COPY internal ./internal
+COPY pkg ./pkg
 RUN CGO_ENABLED=0 go build -buildvcs=false -trimpath -ldflags="-s -w" -o /out/configcenter ./cmd/server
 
 FROM alpine:3.21