ARG OS_VERSION=3.21

FROM docker.io/alpine:${OS_VERSION} AS builder

ARG OS_VERSION=3.21
ARG TZ=Asia/Jakarta

# Set User as root
USER root

# Install base dependencies, set timezone to designated timezone
RUN /bin/mkdir /app; \
    /usr/sbin/addgroup -g 10000 appuser; \
    /usr/sbin/adduser -D -u 10000 -G appuser -s /bin/sh -h /app appuser; \
    /bin/chmod 700 /app; \
    /bin/chown -R appuser:appuser /app; \
    /sbin/apk update --no-cache; \
    /sbin/apk upgrade --no-cache; \
    /sbin/apk add --update --no-cache \
        tzdata; \
    /bin/echo $TZ > /etc/timezone; \
    /bin/cp /usr/share/zoneinfo/$TZ /etc/localtime; \
    /sbin/apk del --no-cache tzdata; \
    /bin/rm -vrf /var/cache/apk/*; 

FROM scratch

ARG OS_VERSION=3.21

LABEL maintainer="Muhamad Aditya Prima <aprimediet@gmail.com>"
LABEL name="alpine"
LABEL version="${OS_VERSION}"
LABEL distribution-scope="public"

#labels for container catalog
LABEL summary="Alpine Linux ${OS_VERSION} container image"
LABEL description="Provide latest release of Alpine Linux ${OS_VERSION} container base image"
LABEL io.k8s.description="Very small alpine linux container image"
LABEL io.k8s.display-name="Alpine Linux ${OS_VERSION}"

COPY --from=builder / /

USER appuser
WORKDIR /app

CMD ["/bin/sh"]