Docker compose scrapdweb with scrapyd the log url use docker name

[xmeng1]

Describe the bug

We use the docker-compose to deploy the scarpyd and scrapydweb,

- SCRAPYD_SERVERS=scrapyd:6800

then in the Scrapydweb, all the Log URL start from scrapyd:6800, is there any way to setup different host for the Log or other link related to Scrapyd?

我们使用 Docker compose 编排 scrapyd 和 scrapydweb, scrapydweb 配置 scrapyd 服务使用 Docker 内部 host name

- SCRAPYD_SERVERS=scrapyd:6800

这样所有的 Log URL 的地址都是 scrapyd:6800 开头, 有办法单独配置这个 host 给所有和 Scrapyd 相关的 link 吗?

To Reproduce
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2. Click on '....'
3. See error

Expected behavior
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Logs
Add logs of ScrapydWeb and Scrapyd (optional) when reproducing the bug.
(It's recommended to run ScrapydWeb with argument '--verbose' if its version >= 1.0.0)

Screenshots
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Environment (please complete the following information):

• Operating system: [e.g. Win 10, macOS 10.14, Ubuntu 18, centOS 7.6, Debian 9.6 or Fedora 29]
• Python version: [e.g. 2.7 or 3.7]
• ScrapydWeb version: [e.g. 1.4.0 or latest code on GitHub]
• ScrapydWeb related settings [e.g. 'ENABLE_AUTH = True']
• Scrapyd version: [e.g. 1.2.1 or latest code on GitHub]
• Scrapyd amount [e.g. 1 or 5]
• Scrapy version: [e.g. 1.8.0, 2.0.0 or latest code on GitHub]
• Browser [e.g. Chrome 71, Firefox 64 or Safari 12]

Additional context
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