instructions for deploying in README.md

README.md

@@ -5,10 +5,71 @@
 `export FLASK_ENV=development`
 `flask run`
 
-# in production
+**Using gunicorn:** 
+
 `gunicorn -w 4 -b 127.0.0.1:5000 app:app`
 * `-w` workers
 * `-b` bind to address / unix socker
 
-or using unix sock: 
-`gunicorn --workers 4 --bind unix:app.sock -m 007 wsgi:app `
+**And gunicorn with using unix sock:** (this how it should run in production) 
+`gunicorn --workers 4 --bind unix:app.sock -m 007 app:app `
+
+## in Production with gunicorn and unix sockets
+Based on https://medium.com/faun/deploy-flask-app-with-nginx-using-gunicorn-7fda4f50066a
+
+### systemd service file
+
+Add to /etc/systemd/system/watermarks.service
+
+```
+[Unit]
+After=network.target
+
+[Service]
+User=psc
+Group=www-data
+WorkingDirectory=/var/www/TacticalApp
+Environment="PATH=/var/www/TacticalApp/venv/bin"
+ExecStart=/var/www/TacticalApp/venv/bin/gunicorn --workers 4 --bind unix:app.sock -m 007 app:app
+
+[Install]
+WantedBy=multi-user.target
+```
+
+## enable  & start service file
+`systemctl enable watermarks.service`
+
+`systemctl start watermarks.service`
+
+It is also a good idea to check the status of the service
+`systemctl status watermarks.service`
+
+## Nginx config
+
+```
+location / {
+  include proxy_params;
+  # it will pass the requests to the socket
+   proxy_pass http://unix:/var/www/TacticalApp/app.sock;
+   # @andre: unsure whether we need a proxy_redirect as well 
+   # if so, it might be somthing like
+   # http://unix:/var/www/TacticalApp/app.sock $scheme://$host:80/;
+    }
+```
+
+## debug.
+
+It might be helpful to enable gunicorn logging, while in development, to check what is going on,
+ by replacing in watermarks.service, the `ExecStart=` value with:
+ 
+`ExecStart=/var/www/TacticalApp/venv/bin/gunicorn --log-level debug --error-logfile /var/www/TacticalApp/app.log --workers 4 --bind unix:app.sock -m 007 app:app`
+
+And reloading the services
+`systemctl daemon-reload`
+
+`systemctl restart watermarks.service`
+
+and the start following app.log:
+`tail -f /var/www/TacticalApp/app.log`
+
+But in the long run logging should be disabled