chore(nginx): updated nodejs.org configuration (#3139)

This PR introduces several Nginx changes that simplify the current configuration and fix current bugs.

Configuration changes
- Merge HTTP and HTTPS server blocks for redirects
- Removes non-needed configuration from the default nodejs.org:80 server block
- Removes the nodejs.org:80 redirect to nodejs.org:443 server block in favor of a return 301 rule
- Removes legacy rules such as (/blog redirecting to blog.nodejs.org), which could cause a "too many redirects" error
- Fixes the blog.nodejs.org:80 configuration which caused "too many redirects" and was broken
- Removed broken server rules such as the newsletter.nodejs.org
- Fixed broken foundation.nodejs.org location rules to the respective links of openjsf.org:443
- Reorganised the file (first both 80/443 ports for nodejs.org then all the extras)
- Added @todo's for the upcoming Next.js rewrite of nodejs.org