fixed nodebb invalid csrf token with cloudflare https config

config.json

{
    "url": "https://DOMAIN",
    "secret": "----",
    "database": "mongo",
    "mongo": {
        "host": "127.0.0.1",
        "port": 27017,
        "username": "",
        "password": "",
        "database": "",
        "uri": ""
    },
    "port": "4567",
    "socket.io": {
        "origins": "*:*"
    }
}

nginx.conf

server {
    listen 80;

    server_name DOMAIN;

    location / {
        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;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header X-Forwarded-Port 443;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;

        proxy_pass http://127.0.0.1:4567;
        proxy_redirect off;

        # Socket.IO Support
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

this thread saving my time, make a short note.
https://community.nodebb.org/topic/13957/csrf-invalid/4