修复解析nsqd/stats 接口json被截断问题

[seiferli]

当 nsqd:4151/stats 超过 4096 字节，json会被截断，导致无法读取 nsqd 的topic信息

[CodFrm]

Thank you, my problem has been resolved.

I have written a new Dockerfile:

FROM golang:1.18-alpine3.16 AS base

WORKDIR /app

COPY . .

RUN go mod tidy && go build -o nsq_exporter ./cmd

FROM alpine:3.16

EXPOSE 9117

COPY --from=base /app/nsq_exporter /nsq_exporter

ENTRYPOINT ["/nsq_exporter"]