Add rootless support for geonode #12939
Description
Add rootless support for geonode django/celery, in addition to this pull request: rootless geonode docker.
Objectives
- Make geonode (django/celery) to run rootless
- Apply some Dockerfile best practices, to reduce image size and number of layers
- Evict to make deeper modifications, like change libraries (except the use of curl and wget - in this case we removed wget and changed to curl)