Merge pull request #70 from sickelap/fix_dev_build

fix setuptools version for use_2to3

backend/Dockerfile

@@ -4,7 +4,10 @@ ARG DEBUG
 WORKDIR /code
 RUN git clone --depth 1 https://github.com/LibrePhotos/librephotos .
 RUN pip install --no-cache-dir -r requirements.txt
-RUN if [ "$DEBUG" = 1 ] ; then pip install -r requirements.dev.txt ;  fi
+RUN if [ "$DEBUG" = 1 ] ; then \
+      pip install setuptools==57.5.0; \
+      pip install -r requirements.dev.txt; \
+    fi
 EXPOSE 8001
 
 COPY entrypoint.sh /entrypoint.sh