Modify nginx proxy settings in Elastic Beanstalk options

nginx.config

files:
  "/tmp/proxy.conf":
    mode: "000644"
    owner: root
    group: root
    content: |

      proxy_send_timeout 600;
      proxy_read_timeout 600;
      send_timeout       600;
container_commands:
  00-add-config:
    command: cat /tmp/proxy.conf >> /etc/nginx/conf.d/00_elastic_beanstalk_proxy.conf
  01-restart-nginx:
    command: /sbin/service nginx restart

According to the doc https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/platforms-linux-extend.html
Now we should place the nginx conf files in .platform/nginx

|-- web.jar
|-- .ebextensions/
|-- .platform/
    |-- nginx/                # Proxy configuration
    |   |-- nginx.conf
    |   `-- conf.d/
    |       `-- custom.conf

This is actually a lot easier because aws will copy nginx conf files and reload nginx process automaticlly so that we don't need to write any command.

Tested at Sept 2021.