fix: GitHub workflow warning while building docker image with recent …

…Poetry versions

- if a "Readme"-File was declared in pyproject.toml, but isn't copied to the root directory of the docker image, the "build-and-publish" GitHub workflow threw a warning ("Warning: The current project could not be installed: [Errno 2] No such file or directory: '/Readme.md'"), which will become an Error in Poetry v2.x
  - see: python-poetry/poetry#8637

Dockerfile

@@ -6,14 +6,14 @@ WORKDIR /
 
 COPY entrypoint.sh entrypoint.sh
 COPY edu_sharing_openapi/ edu_sharing_openapi/
-COPY pyproject.toml poetry.lock ./
-RUN pip3 install poetry
-RUN poetry install
+COPY pyproject.toml poetry.lock Readme.md ./
 COPY scrapy.cfg scrapy.cfg
 COPY setup.cfg setup.cfg
 COPY converter/ converter/
 COPY csv/ csv/
 COPY valuespace_converter/ valuespace_converter/
+RUN pip3 install poetry
+RUN poetry install
 
 
 ENTRYPOINT ["/entrypoint.sh"]