Update the backup and restore image.

FROM docker.io/library/alpine:3.14

FROM docker.io/library/alpine:3.21

# hadolint ignore=DL3018

RUN echo 'https://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories && \

    echo 'https://dl-cdn.alpinelinux.org/alpine/edge/community' >> /etc/apk/repositories && \

RUN echo '@testing https://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories && \

    echo '@community https://dl-cdn.alpinelinux.org/alpine/v3.21/community' >> /etc/apk/repositories && \

    apk add --update --no-cache \

        findutils \

        skopeo \

        reg \

        skopeo@community \

        reg@testing \

    ;

COPY --chown=root:root backup /usr/local/bin/backup

COPY --chown=root:root restore /usr/local/bin/restore