added gunicorn role

roles/gunicorn/files/gunicorn.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Gunicorn Service
+After=nss-user-lookup-target
+
+[Service]
+PIDFile=/run/gunicorn/%i.pid
+User=%i
+Group=%i
+ExecStart=/usr/bin/gunicorn --pid /run/gunicorn/%i.pid \
+    --bind unix:/run/gunicorn/%i.sock %i
+ExecReload=/bin/kill -s HUP $MAINPID
+ExecStop=/bin/kill -s TERM $MAINPID
+PrivateTmp=true
+
+[Install]
+Also=gunicorn@%i.socket

roles/gunicorn/files/gunicorn.socket

@@ -0,0 +1,11 @@
+[Unit]
+Description=Gunicorn Socket
+
+[Socket]
+ListenStream=/run/gunicorn/gunicorn-%i.sock
+RuntimeDirectory=gunicorn
+SocketUser=%i
+SocketMode=0660
+
+[Install]
+WantedBy=sockets.target