How to setup a Scrapy server using Scrapyd on Ubuntu?

This article’s purpose is to introduce how to setup a Scrapy server hosting Scrapy projects by using Scrapyd.

What’s Scrapy?
Scrapy is an application framework for crawling web sites and extracting structured data which can be used for a wide range of useful applications, like data mining, information processing or historical archival.
What’s Scrapyd?
Scrapyd is an application for deploying and running Scrapy spiders. It enables you to deploy (upload) your projects and control their spiders using a JSON API.
Server Installation Guide-Scrapyd
Use apt-get to install Python 3.6.5
to be continued