FROM node:12-alpine COPY . /app WORKDIR /app EXPOSE 8080 # docker build argument # This can be specified during the docker build step by adding " --build-arg build_version=" # App version can be accessed via the uri path /api/version/user # https://vsupalov.com/docker-build-pass-environment-variables/ ARG build_version="userprofile default" ENV APP_VERSION=$build_version RUN npm install CMD npm start