Can't disable sourcemap generation on web build

I try to disable sourcemap generation when building on web.
Working like expected on local build, but not with Azure Pipeline.
I’m on Windows 11 and my docker on Azure is Ubuntu 20.04.4 LTS

I tried to delete all .map files like this issue

Package.json

"web-build": "GENERATE_SOURCEMAP=false expo build:web"

Dockerfile

RUN yarn web-build

RUN rm -f web-build/static/js/*.map

If i list files just after that with
RUN ls -a web-build/static/js/
There’s no more .map files, but in debugger i can see all js files.

What could be the difference between my local environment and docker?