Add faiss to dependencies

backend/dependencies/Dockerfile

@@ -73,3 +73,11 @@ RUN git clone https://github.com/davisking/dlib.git && \
     cmake --build . && \
     cd /dlib && \
     python setup.py install --no USE_AVX_INSTRUCTIONS --no DLIB_USE_CUDA --no USE_SSE4_INSTRUCTIONS  
+
+#Build and install faiss. Needs to be build for ARM 
+WORKDIR /faiss
+RUN git clone https://github.com/facebookresearch/faiss.git /faiss
+RUN cmake -B build . -DFAISS_ENABLE_GPU=OFF -DFAISS_ENABLE_PYTHON=ON -DFAISS_OPT_LEVEL=generic
+RUN make -C build -j faiss
+RUN make -C build -j swigfaiss
+RUN (cd build/faiss/python && python setup.py install)