[FIX] Change models download path to our repository

- also changed to slim buster to decrease the download size

backend/Dockerfile

-FROM python:3.8
+FROM python:3.8-slim-buster
 
 # system packages installation
 
-RUN apt update && apt install -y ffmpeg libimage-exiftool-perl curl nfs-common cifs-utils libopenblas-dev libmagickwand-dev libheif-dev libmagic1 ufraw-batch libboost-all-dev libxrender-dev liblapack-dev git bzip2 cmake build-essential libsm6 libglib2.0-0 libgl1-mesa-glx --no-install-recommends
+RUN apt update && apt install -y ffmpeg libimage-exiftool-perl curl nfs-common cifs-utils libopenblas-dev libmagickwand-dev libheif-dev libmagic1 ufraw-batch libboost-all-dev libxrender-dev liblapack-dev git bzip2 cmake build-essential libsm6 libglib2.0-0 libgl1-mesa-glx libpq-dev --no-install-recommends
 
 # pre trained models download
 WORKDIR /data_models
-RUN mkdir -p /data_models/places365/
-RUN mkdir -p /data_models/im2txt/
 RUN mkdir -p /root/.cache/torch/hub/checkpoints/
-RUN curl -SL https://s3.eu-central-1.amazonaws.com/ownphotos-deploy/places365_model.tar.gz | tar -zxC /data_models/places365/
-RUN curl -SL https://s3.eu-central-1.amazonaws.com/ownphotos-deploy/im2txt_model.tar.gz | tar -zxC /data_models/im2txt/
-RUN curl -SL https://s3.eu-central-1.amazonaws.com/ownphotos-deploy/im2txt_data.tar.gz | tar -zxC /data_models/im2txt/
+RUN curl -SL https://github.com/LibrePhotos/librephotos-docker/releases/download/0.1/places365.tar.gz | tar -zxC /data_models/
+RUN curl -SL https://github.com/LibrePhotos/librephotos-docker/releases/download/0.1/im2txt.tar.gz | tar -zxC /data_models/
 RUN curl -SL https://download.pytorch.org/models/resnet152-b121ed2d.pth -o /root/.cache/torch/hub/checkpoints/resnet152-b121ed2d.pth
 RUN pip install torch==1.8.0+cpu torchvision==0.9.0+cpu -f https://download.pytorch.org/whl/torch_stable.html