FROM alpine:3.18

LABEL org.opencontainers.image.authors="matthias+code@mailbro.de" \
      description="dockerized tftp Server"

ENV ADDR="127.0.0.1" \
    ROOT="/var/tftp"

RUN apk update ; \
    apk upgrade ; \
    apk add --no-cache --update tftp-hpa ; \
    rm /var/cache/apk/* \
    ; \
    adduser -D -u 1000 non-privileged ; \
    mkdir $ROOT ; \
    chown -R 1000:1000 $ROOT
    
VOLUME $ROOT

EXPOSE 69/udp

COPY tftp.conf /etc/init/

# Switch to the non-privileged user
USER 1000

ENTRYPOINT ["in.tftpd"]
CMD ["-Lv", "-s", "/var/tftp"]

HEALTHCHECK --interval=60s --retries=5 CMD nc -u -w 1 127.0.0.1 69 || exit 1