Join slack is not available.

[Huweicai]

This link seems out of date:
https://cloud-native.slack.com/intl/en-gb/join/shared_invite/zt-pzft1ii9-gapo3o2lMryD_CUKZFF7Yg#/

[nate-double-u]

I'm not sure that we need an invite-specific link here.

Here are some links that may be more appropriate:

• General CNCF slack: https://slack.cncf.io
• #cni: https://cloud-native.slack.com/archives/C5K6ZQYHJ
• #cni-dev: https://cloud-native.slack.com/archives/CQ6LDFV8R