Update Dockerfile

backend/Dockerfile

@@ -3,7 +3,7 @@ FROM reallibrephotos/librephotos-base:dev
 ARG DEBUG
 WORKDIR /code
 RUN git clone --depth 1 https://github.com/LibrePhotos/librephotos .
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --break-system-packages --no-cache-dir -r requirements.txt
 RUN if [ "$DEBUG" = 1 ] ; then \
       pip install setuptools==57.5.0; \
       pip install -r requirements.dev.txt; \