$ sudo add-apt-repository -y ppa:ubuntugis/ppa
$ sudo apt-get update
$ sudo apt install gdal-bin python-gdal python3-gdal
$ export CPLUS_INCLUDE_PATH=/usr/include/gdal
$ export C_INCLUDE_PATH=/usr/include/gdal

???

$ pip install -r requirements.txt

python -m pip install -r requirements.txt

$ python server.py &