How dockerize create-react-app can access to azure release pipeline variables in docker environment

Here is the complete flow of problem

1) Azure Build pipeline creates an artefact (docker image) using following DockerFile

FROM hub.docker.prod.private.com/library/node:10.16-alpine as buildImage
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

ENV PATH /app/node_modules/.bin:$PATH
ENV REACT_APP_SERVER_URL=${REACT_APP_SERVER_URL}
ENV REACT_APP_AD_APP_ID=${REACT_APP_AD_APP_ID}
ENV REACT_APP_REDIRECT_URL=${REACT_APP_REDIRECT_URL}
ENV REACT_APP_AUTHORITY=${REACT_APP_AUTHORITY}

COPY package.json /usr/src/app/
RUN npm install
RUN npm install [email protected] -g
COPY . /usr/src/app
RUN npm run build

FROM hub.docker.prod.walmart.com/library/nginx:1.15.12-alpine
COPY --from=buildImage /usr/src/app/build /usr/share/nginx/html
RUN rm /etc/nginx/conf.d/default.conf
COPY nginx/nginx.conf /etc/nginx/conf.d
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

2) And pushes docker image into Azure container registry (ACR).

3) Multistage Release pipeline pulls image from ACR and deploy on azure app service(s)
(QA -> Stage -> Prod).

4) Release pipeline is using variable values from variable group defined in release pipeline and I am
expecting these variable should available in docker environment so that it replaces
ENV variable placeholders in DockerFile.

But after deployment all environment variables that being used inside application remains undefined, can you please correct me if it is possible to use docker environment the way I mentioned above.

Source: StackOverflow