Jetsi-meet interface-config.js file changes not reflected in localhost:8080 source code deploy

I have downloaded code from https://github.com/jitsi/jitsi-meet and successfully build it with make dev command. When I have do some change interface file that changes not reflect on localhost:8080. Could anyone guild me what i am doing wrong ?

As I have check web-pack-config.js file where mentioned one url https://alpha.jitsi.net which is related to WEBPACK_DEV_SERVER_PROXY_TARGET url. As I have checked on internet this all html file work from this url not from my source code so What should I need to do for it. I have use localhost:8080 then I am getting following error.

Error occured while trying to proxy to: localhost:8080/

Can someone guild me what I am doing wrong. I am awaiting your response.

Thanks in advance.