Change user in dockerized alpine

docker-compose.yml

version: "3.7"

services:
    alpine:
        build:
            context: ${PATH_TO_DOCKERFILE}
            args:
                UID: 1002
                GID: 1002

Dockerfile

FROM alpine

ARG UID=1000
ARG GID=1000
ENV UID=${UID}
ENV GID=${GID}

RUN apk update && apk upgrade \
    && apk add --no-cache shadow \
    && usermod -u $UID www-data && groupmod -g $GID www-data \