IMAGE postgres_11.3.0-190620
FROM alpine3.9_3.9.4-190620

RUN EOF
    # Modify OS user (which will be picked up later by apk add)
    sed -i 's/postgres:x:70:70/postgres:x:5432:5432/' /etc/passwd
    sed -i 's/postgres:x:70/postgres:x:5432/' /etc/group

    # Install PostgreSQL
    apk --no-cache add postgresql postgresql-contrib

    # Create socket directory 
    mkdir /run/postgresql
    chown postgres:postgres /run/postgresql
EOF

USER 5432 5432
CMD postgres -D /var/lib/postgresql
READY pg_isready