FROM ubuntu:26.04

RUN apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
        krb5-kdc \
        krb5-admin-server \
        krb5-config && \
    rm -rf /var/lib/apt/lists/*

COPY entrypoint.sh /entrypoint

RUN chmod +x /entrypoint

EXPOSE 88/tcp 88/udp 464/tcp 464/udp 749/tcp

ENTRYPOINT ["/entrypoint"]
