[QA] Update EOS dev docs

[jnweiger]

In order to provide better service to the BTR team, useful documentation should be provided.
The current documentation at docs/ocis/eos.md (https://owncloud.github.io/ocis/eos) is outdated.

• It discusses a setup using ocis/docker-compose.yml with 6 additional steps.
• This setup fails since RC1
• It does not address remote access.

For QA, a dedicated ocis/docker-compose-eos-test.yml is provided, that should not need additional steps for localhost testing.

The documentation should

• mention ocis/docker-compose-eos-test.yml and explain its usage. For RC5 testing, the BTR team currently uses

  cd ocis/ocis
  checkout master
  cp docker-compose-eos-test.yml master-docker-compose-eos-test.yml
  checkout v1.0.0-rc5
  env EOS_OCIS_TAG=1.0.0-rc5 BRANCH=v1.0.0-rc5 docker-compose -f master-docker-compose-eos-test.yml up -d
  

  This uses docker images from https://hub.docker.com/search?q=owncloud%2Feos&type=image
  and only works on localhost. (Mobile client testing is thus blocked)

• have steps for remote deployment. E.g. provide a template for identifier-registration.yml

• discuss eos deployment options. E.g. Single host or cluster.

• list the demo instance maintained by the team for testing.

• The scope of ocis/docker-compose.yml should be clarified: localhost only, no eos.

Earlier issue: #361 Afaik, most of the items there are no longer relevant -- review needed.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 10 days if no further activity occurs. Thank you for your contributions.