remove requirements.*, and use pipenv in docker

Dockerfile

@@ -5,8 +5,6 @@ EXPOSE 8000
 RUN mkdir /app
 WORKDIR /app
 
-ADD requirements.txt ./
-
 RUN apt-get update -qq && apt-get install -qqy \
     apt-transport-https \
     git \
@@ -18,12 +16,16 @@ RUN apt-get update -qq && apt-get install -qqy \
  && echo "deb [arch=amd64] https://download.docker.com/linux/debian jessie stable" >> /etc/apt/sources.list \
  && apt-get update -qq && apt-get install -qqy docker-ce
 
-RUN pip3 install --no-cache-dir -r requirements.txt \
+RUN pip3 install --no-cache-dir \
     gunicorn \
     ipython \
+    pipenv \
     psycopg2-binary \
     python-memcached
 
+ADD Pipfile Pipfile.lock ./
+RUN pipenv install --system --deploy
+
 ADD . .
 
 CMD /srv/dashboard/robotpkg/bootstrap/bootstrap \

requirements.in

-ndh
-django-filter
-django-tables2
-gitpython
-requests

requirements.txt

-#
-# This file is autogenerated by pip-compile
-# To update, run:
-#
-#    pip-compile --output-file requirements.txt requirements.in
-#
-certifi==2018.1.18        # via requests
-chardet==3.0.4            # via requests
-django-autoslug-iplweb==1.9.4.dev0  # via ndh
-django-bootstrap4==0.0.6  # via ndh
-django-filter==1.1.0
-django==2.0.4             # via django-tables2, ndh
-gitdb2==2.0.3             # via gitpython
-gitpython==2.1.9
-idna==2.6                 # via requests
-ndh==3.5.1
-pytz==2018.4              # via django
-requests==2.18.4
-smmap2==2.0.3             # via gitdb2
-urllib3==1.22             # via requests
-https://github.com/jieter/django-tables2/archive/master.zip