Feature fix missing ontologies in docker

[ebroda]

Summary of the discussion

As of #1622 the docker-image is currently missing the oeo. This PR adds a command to the Dockerfile to create the folder, download the latest oeo from github and extract it. So the oeo is correctly included in the Docker image. Afterwards, #1622 is fixed (in connection with #1627).

Also the docker readme is extended to include the docker build command to create the image on your own (if you e.g. change stuff).

Type of change (CHANGELOG.md)

Updated

• Include oeo in oeplatform docker image (#1631)

Workflow checklist

Automation

Closes #1622

PR-Assignee

• [x] 🐙 Follow the workflow in CONTRIBUTING.md
• [x] 📝 Update the CHANGELOG.md
• [ ] 📙 Update the documentation on mkdocs

Reviewer

• [ ] 🐙 Follow the Reviewer Guidelines
• [ ] 🐙 Provided feedback and show sufficient appreciation for the work done

[ebroda]

Isn't unzip something that needs to be installed first? Maybe we should use the tar.gz

Unzip is included in the base image, no need to install it.

$ docker exec -ti docker-oep_oeplatform_1 bash
root@d82c2ffcae71:/app# unzip -v
UnZip 6.00 of 20 April 2009, by Debian. Original by Info-ZIP.
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