Web Layer for security

Hi @amy.blais ,
Thanks for reply, I have instructions to install NGNIX.

But I am not sure it will act as proxy server or web server if I will install this.
Our security team says the I have installed app and db for mattermost on same server and its not secure architecture, need to add one web layer into that.

So if I configure NGNIX will it act as web server?

Thanks in advance
Bharat