This image is forked from appropriate/docker-postgis Branch pgrouting docker-postgis/9.4-2.1 just to have it save for my own use. The following text is copied from the forked repository.
The postgis image provides a Docker container running Postgres 9 with
PostGIS 2.1 installed. This image is
based on the official postgres
image and provides variants for each version of Postgres 9 supported by the
base image (9.0-9.4).
This image ensures that the default database created by the parent postgres
image will have the postgis and postgis_topology extensions installed.
Unless -e POSTGRES_DATABASE is passed to the container at startup time, this
database will be named after the admin user (either postgres or the user
specified with -e POSTGRES_USER). For Postgres 9.1+, the fuzzystrmatch and
postgis_tiger_geocoder extensions are also installed.
If you would prefer to use the older template database mechanism for enabling
PostGIS, the image also provides a PostGIS-enabled template database called
template_postgis.
In order to run a basic container capable of serving a PostGIS-enabled database, start a container as follows:
docker run --name some-postgis -e POSTGRES_PASSWORD=mysecretpassword -d mdillon/postgis
For more detailed instructions about how to start and control your Postgres
container, see the documentation for the postgres image
here.
Once you have started a database container, you can then connect to the database as follows:
docker run -it --link some-postgis:postgres --rm postgres \
sh -c 'exec psql -h "$POSTGRES_PORT_5432_TCP_ADDR" -p "$POSTGRES_PORT_5432_TCP_PORT" -U postgres'
See the PostGIS documentation for more details on your options for creating and using a spatially-enabled database.