Website 3tier architecture with spring boot

Hi guys i would like to ask about how do you develop a website with 3 tier architecture with spring boot. The main problem that i face is that i cant understand the cliend where will send the http request to get the page into an APACHE server that will have the static front-end files and then with the javascript calls to fetch from the tomcat or to put the files inside the resource and get the spring boot programm the calls and serve the html pages?