Docker write in shared volumes docker : reference

https://stackoverflow.com/questions/29245216/write-in-shared-volumes-docker

https://stackoverflow.com/questions/23544282/what-is-the-best-way-to-manage-permissions-for-docker-shared-volumes?rq=1

Dockerfile

FROM debian:jessie
# add our user and group first to make sure their IDs get assigned consistently, regardless of other deps added later
RUN groupadd -r app \
  && useradd -r -g app app
RUN mkdir -p /data/app \
  && chown -R app:app /data/app
VOLUME /data/app
USER app
CMD ["echo", "Data container for app"]

$ docker run -it volume_test bash
app@8839f8e5369e:/$ ls -ld /data
drwxr-xr-x 3 root root 4096 Jan 10 23:56 /data
app@8839f8e5369e:/$ ls -ld /data/app/
drwxr-xr-x 2 app app 4096 Jan 10 23:56 /data/app/
app@8839f8e5369e:/$ 

https://medium.com/@ramangupta/why-docker-data-containers-are-good-589b3c6c749e

https://docs.docker.com/engine/admin/volumes/volumes/#start-a-service-with-volumes

https://container42.com/2014/11/18/data-only-container-madness/

https://www.tecmint.com/install-run-and-delete-applications-inside-docker-containers/

https://container42.com/2013/12/16/persistent-volumes-with-docker-container-as-volume-pattern/