Remove html extension and map URL to static html file in Nginx

Useful for serving static website

Add or remove domain to existing Letsencrypt's cert

For installation via certbot

Adding CORS header for specific domains in Nginx

Increase file descriptor for RabbitMQ

For ubuntu 16.04

Rails url helper does not respect "relative_url_root" configuration in mailer

Specify relative url for mailer using script_name

Using a custom config file

Store application specific configuration in a custom config file

Rate Limiting on Nginx

To prevent security attack, load attack and create a fair usage environment.