Don't use an external volume.

Jim Fulton · Jim Fulton · commit 184a758d737c · 2015-10-15T10:15:17.000-04:00
diff --git a/9.4/Dockerfile b/9.4/Dockerfile
@@ -40,7 +40,6 @@ 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 /
 
