Fix dependencies

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

Dockerfile

@@ -7,6 +7,9 @@ WORKDIR /code
 
 RUN apt update && \
     apt install -y gettext nginx uwsgi uwsgi-plugin-python3 && \
+    apt install -y python3-django python3-django-crispy-forms \
+        python3-django-extensions python3-django-tables2 python3-docutils \
+        python3-psycopg2 && \
     rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt /code/