Haproxy config file

Hi , Im new to this . Can you pls explain what is missing in the haproxy config file.

Im not able to find the error in the config file. i did systemctl status haproxy. it gave me a hint Proxy ‘main’ unable to find the default_backend app… where exactly is the issue in config file.

@mrahul27 compare it with a sample config file online & you will be able to find a very small issue. After fixing that issue you will be able to restart the haproxy.