useful_info.txt

# Nginx SELinux Configuration
https://www.getpagespeed.com/server-setup/nginx/nginx-selinux-configuration


# How I identified the problem: read comments here
https://serverfault.com/questions/732517/nginx-wont-connect-to-my-socket-due-to-insufficient-permissions


# How I opened port:80
https://linuxhint.com/open-port-80-centos7/


# How to deal with firewall, in case it is needed
https://linuxhint.com/open-port-80-centos7/


# Check server is listening on specific port (from a local machine)
https://linuxhint.com/open-port-80-centos7/
https://www.thegeekdiary.com/centos-rhel-how-to-find-if-a-network-port-is-open-or-not/


# Explanation of nginx configuration
https://www.linode.com/docs/web-servers/nginx/how-to-configure-nginx/


# Main guide I followed to set up uwsgi, nginx, and flask
https://www.digitalocean.com/community/tutorials/how-to-serve-flask-applications-with-uwsgi-and-nginx-on-centos-7


# Useful commands:
sudo systemctl [reload/restart] [nginx/app]  # check for more info
sudo journalctl [nginx/app]  # check for more info
sudo systemctl daemon-reload  # when you modify app.ini
sudo nginx -t  # to test if nginx configuration is fine 


# Important files
/etc/nginx/nginx.conf  # all nginx configuration
/flask-app/app.ini  # all uwsgi configuration
/etc/systemd/system/app.service  # to tell the system to start the app at boot 
                                 # and run it in the background


# Find public IP address of machine
curl icanhazip.com