有关我的Web服务器的服务器配置的任何建议？

I am setting up a web server for a client. They will be using a web app (PHP/LAMP) that I am building. The server will be sitting within their network locally. There will also be a MySQL database on the same server. The load on the server will only be 20-25 concurrent users, but uptime and performance is still very important.I am setting up a web server for a client. They