add some of server (diesel, eventlet, gevent, paste, twisted, waitress, wsgiref) in some os

docker/python/web2py-tornado/Dockerfile

@@ -1,7 +1,10 @@
 FROM python:2.7
 
+#LABEL your_label
+
 RUN apt update && \
  apt install -y unzip wget python-pip && \
+ pip install --upgrade pip && \
  pip install tornado
 
 RUN groupadd -r web2py && \