Not able to run appsmith in kubernetes with podsecurity policy enabled: cp: can't create '/etc/nginx/nginx.conf': File exists

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

In production one need to run containers as non-root users. When I enable securityContext for appsmith/appsmith-editor
it gives me error
+ cp /nginx-root.conf.template /etc/nginx/nginx.conf
cp: can't create '/etc/nginx/nginx.conf': File exists

### Steps To Reproduce
[frontend-template.txt](https://github.com/appsmithorg/appsmith/files/7890131/frontend-template.txt)
change the frontend-template.yaml into the attached file
and run kubectl create -f frontend-template.yaml

### Environment

Production

### Version

Self-Hosted