v1.9.9-4

What's new:

Recently, we are working on the next generation of Nginx UI (v2), and you can check the progress at https://github.com/users/0xJacky/projects/1. If you want to experience the latest program, please install this update. The new upgrader allows you to get updates from the prerelease channel. At the same time, we recommend all users install this update, as it contains fixes for issues related to auto-cert. It's worth noting that before the release of the v2 preview, we will use v1.9.9-x as the version number.

Please feel free to send feedback, suggestions or bug reports in Github issues.

Refactor:

1. Use zap as default logger

Enhances:

1. Added error prompts in form
2. Log level now determined by settings.Server.RunMode
3. Get lego's logs and send them to frontend

Fix:

1. Auto Cert indicates that there is no resolver.

Docs:

1. New online documentation. (@Hintay)

Thanks for @Hintay 's contruibution.