Customization of UI Dspace 7.5

[PROTOS tecnologia (PROTOS TECNOLOGIA)]

Hi, everbody. I;ve already have installed Dspace 7.5 Back and front.

I am on stuck with customization.

I followed this instruction: https://wiki.lyrasis.org/display/DSDOC7x/User+Interface+Customization

But i cant do the customization.

Basically i only need to change the logo and the banner of the Interface.

Assuming I have correctly made the changes for the logo and banner...

I need to restart yarn through : yarn build:prod

in order to taking the changes made?

Please i hope you could help me.