Redesign website to show existing solution first and petition on the side

since on 29.11.2018 one of the major players in Serverless world started to support native Ruby (AWS Lambda)

I think the serverless-ruby.org website should serve more as an informative website to show existing solutions + petition on the side, rather than petition as the main website purpose

### Reasons

Back in March there was few hacky solutions to do FaaS now there is starting to be several solid ways for Ruby developer to do FaaS.

Once AWS introduce something, other providers will try to catch up quickly (e.g. Microsoft functions )

I still want to keep the petition but main topic of the website will be some resources with nice icons to technologies at the top and petition on the side.

### Plan:

* keep the petition but don't make it main theme of the website
* landing page will point to existing solutions with better descriptions and links to guides
* maybe even discussion forum ( :thinking: would you like this ? )

从当前的网站落地页和请愿流程开始，然后查看现有 Ruby serverless 解决方案和指南是如何呈现的。完成的标准是落地页首先展示信息丰富的解决方案链接和描述，同时请愿仍作为次要元素保留并可用。

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