Describe the bug
When runningyarn build, the commandcp -r ./web-app/build/ ./builld copies the./web-app/build to./build/build folder.

I think the right command would be:

Seehttps://askubuntu.com/a/86824

cp -r ./web-app/build/. ./build/ # notice the dot

Desktop (please complete the following information):

• Platform: Linux
• OS: Fedora
• Version 31