Commands I run:
docker build . -t postgres -f Dockerfile
docker run -v /home/maxime_lacroix69110/machine-overview/DataBase/again/:/var/lib/postgresql/data postgres

#Getting the image
FROM postgres:11.1
#Creating the user
USER postgres
#Setting env
ENV POSTGRES_USER=postgres
ENV POSTGRES_PASSWORD=toor
VOLUME ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql"]

#Adding the official postgres script for setting everything up (all the special port configs)
ADD https://github.com/docker-library/postgres/blob/master/docker-entrypoint.sh /
#Copying my database tables
COPY ./DBInit.sql /

#Then the idea is to launch postgres with the sql tables set out
#CMD "postgres < cat DBInit.sql" does not work as cat is not installed as well as sudo
#I tried to get it work but it's just a mess of errors