Fix pytorch and faiss

backend/Dockerfile

 FROM reallibrephotos/librephotos-dependencies:dev
 
 # install rust
-RUN apt install -y rustc
+RUN apt install -y rustc libtinfo5
+# unzip faiss to actually installed it...
+RUN unzip /usr/local/lib/python3.9/dist-packages/faiss*.egg -d /usr/local/lib/python3.9/dist-packages/
 # actual project
 ARG DEBUG
 WORKDIR /code