Refering the community page from the main Website

[Raphael Bircher]

Hi all

At the moment, we have no link at https://weex.incubator.apache.org who  
refers to the community page. So if someone want to join the community he  
has a really hard time to find the Mailing list for example

Also we should include the standard apache links like Sponsor site of the  
ASF.

Regards, Raphael

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My introduction https://youtu.be/Ln4vly5sxYU