PIPELINE: Fix path to requirements.txt

.docker/Dockerfile

@@ -11,7 +11,7 @@ RUN apt-get update && \
 ARG PYLIB
 RUN echo "PYLIB=${PYLIB}"
 COPY .docker/wait-for-it.sh /wait-for-it.sh
-RUN pip install -r requirements.txt
+RUN pip install -r ./requirements.txt
 ADD https://gitlab.indiscale.com/api/v4/projects/97/repository/commits/${PYLIB} \
     pylib_version.json
 RUN git clone https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git && \