Its very good Fix, but since EBS is Auto Scaled we cant do change the nginx.conf manually every time it scales so we need to create a configuration for EBS in our code, you can see the below link..

https://akshaykrisonz.medium.com/fix-413-request-entity-too-large-nginx-error-on-aws-elastic-beanstalk-via-ebs-configuration-7533ad28ac06