Basic Gunicorn/Supervisor/Nginx config for deploying Python apps.

gunicorn_config.py

import multiprocessing

bind = '0.0.0.0:8000'
workers = multiprocessing.cpu_count()
worker_class = 'gevent'
accesslog = '/var/log/progam_name/gunicorn/access.log'
errorlog = '/var/log/progam_name/gunicorn/error.log'
loglevel = 'debug'
access_log_format = '[%(h)15s] (%(s)s) [%(D)8sms] %(r)s | %(b)sb'
proc_name = 'progam_name_gunicorn'
timeout = 15

nginx_program_name.conf

server {
    listen 80;
    listen [::]:80;

    # SSL
    # listen 443;
    # listen [::]:443;

    server_name YOUR_SERVER_NAME;

    access_log  /var/log/progam_name/nginx/access.log;
    error_log  /var/log/progam_name/nginx/error.log;

    location / {
        proxy_pass         http://127.0.0.1:8000/;
        proxy_redirect     off;

        proxy_set_header   Host                 $host;
        proxy_set_header   X-Real-IP            $remote_addr;
        proxy_set_header   X-Forwarded-For      $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto    $scheme;
    }
}

supersivor.conf

[program:progam_name]
command=pipenv run gunincorn main:app -c conf/gunicorn_conf.py
directory=/home/username/apps/progam_name
autostart=true
autorestart=true
stderr_logfile=/var/log/progam_name/supervisor/err.log
stdout_logfile=/var/log/progam_name/supervisor/out.log