server { listen 9999; server_name docker_flask_gunicorn_nginx; location / { proxy_pass http://flask_app:9001; # Do not change this proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } location /static { rewrite ^/static(.*) /$1 break; root /static; } }