Update Dockerfile

backend/Dockerfile

 FROM reallibrephotos/librephotos-dependencies:dev
 
-# install rust
+# install rust, a missing requirenment from pytorch and unzip
 RUN apt install -y rustc libtinfo5 unzip
 # 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/