💡Parameterize UID/GID in Dockerfile to run docker image as another user

**Describe the feature you'd like**
Would it be possible to add ENV variables for UID/GID to be able to change them runtime? In rare circumstances it's preferable to run as root or another user (which was default before). This line: https://github.com/cloudflare/cloudflared/blame/1cedefa1c22a74dd6371d4920398d553d01f1391/Dockerfile#L34

**Additional context**
Here is an example on how Microsoft has done it in their docker images: https://github.com/dotnet/dotnet-docker/blob/main/src/runtime-deps/10.0/alpine3.22/amd64/Dockerfile

Additional context on why, is here:
https://github.com/dotnet/dotnet-docker/issues/4506