A example Dockerfile for Postgres 2.4 downloded from https://registry.hub.docker.com/_/postgres/

Dockerfile Postgres

# vim:set ft=dockerfile:
FROM debian:wheezy

# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r postgres && useradd -r -g postgres postgres

# grab gosu for easy step-down from root
RUN gpg --keyserver pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/* \
  && curl -o /usr/local/bin/gosu -SL "https://github.com/tianon/gosu/releases/download/1.2/gosu-$(dpkg --print-architecture)" \
  && curl -o /usr/local/bin/gosu.asc -SL "https://github.com/tianon/gosu/releases/download/1.2/gosu-$(dpkg --print-architecture).asc" \
  && gpg --verify /usr/local/bin/gosu.asc \
  && rm /usr/local/bin/gosu.asc \
  && chmod +x /usr/local/bin/gosu \
  && apt-get purge -y --auto-remove curl

# make the "en_US.UTF-8" locale so postgres will be utf-8 enabled by default
RUN apt-get update && apt-get install -y locales && rm -rf /var/lib/apt/lists/* \
  && localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
ENV LANG en_US.utf8

RUN mkdir /docker-entrypoint-initdb.d

RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8

ENV PG_MAJOR 9.4
ENV PG_VERSION 9.4.4-1.pgdg70+1

RUN echo 'deb http://apt.postgresql.org/pub/repos/apt/ wheezy-pgdg main' $PG_MAJOR > /etc/apt/sources.list.d/pgdg.list

RUN apt-get update \
  && apt-get install -y postgresql-common \
  && sed -ri 's/#(create_main_cluster) .*$/\1 = false/' /etc/postgresql-common/createcluster.conf \
  && apt-get install -y \
    postgresql-$PG_MAJOR=$PG_VERSION \
    postgresql-contrib-$PG_MAJOR=$PG_VERSION \
  && rm -rf /var/lib/apt/lists/*

RUN mkdir -p /var/run/postgresql && chown -R postgres /var/run/postgresql

ENV PATH /usr/lib/postgresql/$PG_MAJOR/bin:$PATH
ENV PGDATA /var/lib/postgresql/data
VOLUME /var/lib/postgresql/data

COPY docker-entrypoint.sh /

ENTRYPOINT ["/docker-entrypoint.sh"]

EXPOSE 5432
CMD ["postgres"]