Support Cloudflare with Nginx for Digital Ocean Droplet

[NghiaTranUIT]

In order to prevent DDOS and protect the service better, it'd nice to introduce Cloudflare.
On the other hand, Nginx is responsible for proxying and hiding the port :7300.

Acceptance Criteria

• Support Cloudflare
• Setup Nginx and expose default port :80

[NghiaTranUIT]

Nginx + Go server : https://www.digitalocean.com/community/tutorials/how-to-use-martini-to-serve-go-applications-behind-an-nginx-server-on-ubuntu

[NghiaTranUIT]

Cloudflare SSL and Authenticated Pull Origin : https://www.digitalocean.com/community/tutorials/how-to-host-a-website-using-cloudflare-and-nginx-on-ubuntu-16-04

[NghiaTranUIT]

Done: From now we could access by https://megaton.xyz 👨‍💻